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PHYSICS For Class X
MCQ’S BOOK
By USTANI G
“According to the prescribed syllabus of all board of secondary education, Sindh”
TEAM OF USTANI G Free educational team, Karachi.
CONTENTS
- CHAPTER # 01: SIMPLE MACHINES
- CHAPTER # 02: WAVES AND SOUND
- CHAPTER # 03: PROPAGATION AND REFLECTION OF LIGHT
- CHAPTER # 04: REFRACTION OF LIGHT AND OPTICAL INSTRUMENTS
- CHAPTER # 05: NATURE OF LIGHT AND ELECTROMAGNETIC SPECTRUM
- CHAPTER # 06: ELECTRICITY
- CHAPTER # 07: MAGNETISM AND ELECTROMAGNETIC
- CHAPTER # 08: ELECTRONICS
- CHAPTER # 09: NUCLEAR PHYSICS
CHAPTER # 01SIMPLE MACHINES
1- A device which helps us in doing work.a. Machine ✓
b. Power
c. Energy
d. Force
2- Human arm is which kind of lever ____kind.
a. 1st
b. 2nd
c. 3rd ✓
d. None of These
3- Door is which kind of lever ____kind.
a. 1st
b. 2nd ✓
c. 3rd
d. None of These
4- The Sea-saw is which kind of lever ____kind.
a. 1st ✓
b. 2nd
c. 3rd
d. None of These
5- The Mechanical advantage of movable pulley is:
a. 4
b. 2 ✓
c. 1
d. 3
6- The mechanical advantage of screw jack is _______.
a. 2πd/h
b. 2πh/d ✓
c. 2πdh
d. None of these
7- The ratio between resistance overcome and force applied on the machine is called:
a. Efficiency
b. Mechanical Advantage ✓
c. Useful Work
d. Momentum
8- Work done on the machine is called:
a. Output
b. Input ✓
c. Energy
d. Efficiency
9- The work done by the machine on the weight is called:
a. Output ✓
b. Input
c. Energy
d. Efficiency
10- The ratio between input and output is:
a. Output
b. Input
c. Energy
d. Efficiency ✓
11- A pair of scissors is an example of _________.
a. Pulley
b. Lever ✓
c. Wheel and axle
d. None
12- If the fulcrum of a lever is between the efforts and resistance, it is a _________ kind of lever.
a. 1st ✓
b. 2nd
c. 3rd
d. None of These
13- A simple Machine which is used to Lift a car or a heavy automobile is called:
a. Screw
b. Wedge
c. Lever
d. Screw Jack ✓
14- Mechanical Advantage of single fixed pulley is:
a. 4
b. 2
c. 1 ✓
d. 3
15- The efficiency of a machine is 100% if its input is equal to:
a. 0
b. 100
c. Output ✓
d. Input
16- A ________ kind of lever is a simple machine.
a. 1st ✓
b. 2nd
c. 3rd
d. None of These
17- A rigid bar which can be rotated about fixed point fulcrum is called:
a. Screw Jack
b. Pulley
c. Lever ✓
d. Inclined Plane
18- For an ideal machine the input is always equal to:
a. Output ✓
b. Energy
c. Efficiency
d. None of them
19- The turning effect of any force is called:
a. Lever
b. Efficiency
c. Torque ✓
d. M.A
20- IF W = 600 N, P= 300 N then M.(A) is:
a. 4
b. 2 ✓
c. 1
d. 3
CHAPTER # 02WAVES AND SOUND
1- The speed of sound in air at normal temperature and pressure is:a. 300
b. 330
c. 333
d. 340 ✓
2- Speed of sound in air at 0° is ________.
a. 332 ✓
b. 342
c. 352
d. 362
3- The maximum beat frequency that human ear can detect is _______ beats per second.
a. 1
b. 7 ✓
c. 14
d. 21
4- Pitch of sound depends upon _________.
a. Frequency ✓
b. Wavelength
c. Both a and b
d. None of these
5- A human ear can't hear sound or frequency more than ________.
a. 20,000 hertz ✓
b. 2,000 hertz
c. 200 hertz
d. 20 hertz
6- A human ear can't hear sound or frequency more than:
a. 5 Hz
b. 10 Hz
c. 15 Hz
d. 20 Hz ✓
7. The audible frequency range Is between _______ Hz to 20 kHz.
a. 20 ✓
b. 15
c. 2,000
d. 20,000
8. Transverse waves consist of ________ and _________.
a. Crest
b. trough
c. Crest and trough ✓
d. None
9. The unit of sound is:
a. Decibel ✓
b. Hz
c. m
d. no unit
10. The sound retains in our auditory system for _____ second.
a. 1
b. 10
c. 0.1 ✓
d. None of these
11. Nodes are the points of___________ Interference.
a. constructive
b. destructive ✓
c. total internal
d. None of these
12- The waves produced by a vibrating body in air is ___________.
a. Longitudinal ✓
b. Non longitudinal
c. Parallel
d. None of these
13- ____________ can be used in echo-depth sounding devices to determine depth or the sea floor.
a. Infrasonic
b. Ultrasonic ✓
c. Both a & b
d. None of these
14- ____________ is also a periodic motion.
a. Simple Harmonic Motion ✓
b. Projection of rocket
c. Both a and b
d. None of these
15- Sound waves are type of waves called:
a. Transverse waves
b. Standing Waves
c. longitudinal mechanical waves ✓
d. none of these
16- If mass attached to a spring becomes four times, the time period of Its S.H.M will become ______.
a. half
b. two ✓
c. three
d. Four
17- ___________ is the response of an object to a periodic force acting it.
a. Resonance ✓
b. tuning fork
c. Sound
d. All of them
18- The time period of second pendulums is _________.
a. One second
b. Two second ✓
c. Half second
d. Nano second
19- Compressional or longitudinal waves consists of compression and ___________.
a. refraction
b. Rarefaction ✓
c. Interference
d. None of these
20- Maximum displacement from the mean position is called ____________.
a. amplitude ✓
b. frequency
c. time period
d. Wave length
21- The distance between two consecutive crests or troughs is called __________.
a. wavelength ✓
b. frequency
c. time period
d. Amplitude
22- ___________ is expressed by vibrations per second per second or cycle per second or hertz.
a. Wavelength
b. Frequency
c. Time period ✓
d. Amplitude
23- A longitudinal wave whose frequency is below the audible range is called ___________.
a. Infrasonic ✓
b. Ultrasonic
c. Both a & b
d. None
24- The formula to calculate the wavelength of sound wave is __________.
a. λ= F / V
b. λ= FV
c. λ= V / F ✓
d. All of them
25- Sound waves cannot travel in the vacuum.
a. True ✓
b. False
c. Wrong
d. None of these
CHAPTER # 03PROPAGATION AND REFLECTION OF LIGHT
1-The image formed by _______ mirror is always virtual, erect, diminished and smaller than the object itself.a. concave
b. convex ✓
c. both a & b
d. None
2- Image formed by a plane mirror is laterally ________.
a. inverted
b. virtual
c. both a & b ✓
d. None
3- If q = 12 cm and p = 6 cm, then the magnification of the mirror is:
a. ½
b. 3
c. 4
d. 2 ✓
4- If the Inner surface of a spherical mirror is reflecting it is called _______ mirror.
a. concave ✓
b. convex
c. plane
d. All of these
5- If the object is placed at the centre of curvature of a concave mirror_____, _____and _____ image is formed.
a. virtual, erect and enlarged
b. real, inverted and small
c. real, inverted and equal ✓
d. real, inverted and enlarge
6- All rays, parallel to the principal axis falling on a concave mirror, after reflection passes through its:
a. centre of curvature
b. pole
c. principle focus ✓
d. None of these
7- The distance between pole p and focus F is known as:
a. focus
b. Aperture
c. focal length ✓
d. radius of curvature
8- The principle of pin-hole camera is:
a. light rays travel in a straight line ✓
b. light rays travel in a curve
c. light rays do not travel
d. None of these
9-Whenever a ray of light comes back into the same medium after striking the surface of other medium, this phenomenon is called:
a. real image
b. motion of particle
c. Reflection ✓
d. energy
10-The reflection by the rough surfaces is called:
a. regular reflection
b. irregular reflection ✓
c. regular refraction
d. irregular refraction
11- The nature of light is wave as well as particle, thus its nature is:
a. negative
b. triple
c. single
d. Dual ✓
12- The centre of the spherical mirror whose part is known as:
a. centre of curvature ✓
b. pole
c. principle focus
d. None of these
13- if focal length is negative then mirror is called:
a. concave mirror
b. convex mirror ✓
c. plane mirror
d. None of these
14- If q is negative then Image will be:
a. inverted
b. virtual ✓
c. real
d. none of them
15- A mirror which converges all the rays after reflection at a point is known as:
a. concave mirror ✓
b. convex mirror
c. plane mirror
d. None of these
16- The flat smooth reflecting surface shows regular reflection is known as:
a. concave mirror
b. convex mirror
c. plane mirror ✓
d. None of these
17- If q = 12 cm and p = 2 cm, then the magnification of the mirror is:
a. 4
b. 5
c. 8
d. 6 ✓
18- Law of reflection state that - The angle of incidence is _________ to the angle of reflection.
a. not equal
b. equal ✓
c. double
d. half
19- The speed of light in vacuum is ____ m/s.
a. 3 x 10⁵
b. 3 x 10⁶
c. 3 x 10⁷
d. 3 x 10⁸ ✓
20- Angle between incident ray and normal ray is called angle of:
a. reflection
b. refraction
c. transmission
d. incident ✓
CHAPTER # 04REFRACTION OF LIGHT AND OPTICAL INSTRUMENTS
1-The image formed on retina is ___________.a. real , imaginary
b. Real , inverted ✓
c. inverted, imaginary
d. None of these
2- Least distance of distinct vision for a normal human eye is _______.
a. 6 cm
b. 10 cm
c. 20 cm
d. 25 cm ✓
3- The eye and camera is similar because the image formed in both is:
a. real
b. Inverted
c. real and inverted ✓
d. None of these
4- The pupil of eye controls:
a. image
b. light ✓
c. retina
d. None of these
5- ________ lens is considered as converging lens.
a. Concave
b. Biconvex
c. Both a and b
d. Convex ✓
6- Critical angle of glass is:
a. 42° ✓
b. 45°
c. 49
d. none of these
7- Short sightedness is removed by ________ lens.
a. concave ✓
b. convex
c. both a and b
d. None
8- Optical fibre is the application of _______ Reflection.
a. partial
b. total internal ✓
c. all
d. None
9-___________ takes place when the angle of incidence is greater than the critical angle.
a. Total internal reflection ✓
b. Reflection
c. REFRACTION
d. None of these
10- The unit of power of lens is:
a. Joule
b. Diopter ✓
c. Watt
d. None
11-If the focal length of lens is 10 cm its power will be:
a. 5 Diopter
b. 10 Diopter
c. 15 Diopter
d. 20 Diopter ✓
12- The ratio of the size of the image to the size of object is called:
a. reflection
b. refraction
c. transmission
d. Magnification ✓
13- Magnification = ___________.
a. ho ÷ hi
b. hi ÷ ho ✓
c. ho x hi
d. None
14- The ability of lens to adjust itself in a human eye is called:
a. vision
b. accommodation ✓
c. Nothing
d. none
15- For total internal reflection the angle of incidence must be _________ than the critical angle.
a. smaller
b. greater ✓
c. equal
d. None
16- The speed of light in air is ____ m/s.
a. 3 x 10⁵
b. 3 x 10⁶
c. 3 x 10⁷
d. 3 x 10⁸ ✓
17- The focal length of __________ lens is negative.
a. Convex
b. Biconvex
c. Both a and b
d. Concave ✓
18- Magnifying power of simple microscope is:
a. M = d/f
b. M = 1/d + f
c. M = 1+ d/f ✓
d. none of these
CHAPTER # 05NATURE OF LIGHT AND ELECTROMAGNETIC SPECTRUM
1.The wave-length of red light is _________ than that of violet light.a. smaller
b. greater ✓
c. better
d. None
2. Small drops of rain water disperse sunlight into different colours. This phenomenon is called:
a. Interference
b. Diffraction
c. Dispersion ✓
d. None
3. The radiation which produces the sensation or heat is called _________.
a. Invisible light
b. Ultraviolet rays
c. Infrared rays ✓
d. Visible light
4. According to Huygens’s wave theory, light propagate In the shape of _______ .
a. particles
b. waves ✓
c. photon
d. None
5. Which of the following examples of electromagnetic radiation has the shortest wavelength?
a. X-rays ✓
b. Ultraviolet rays
c. Infrared rays
d. Radio waves
6. Which among the following is having more wavelengths?
a. X-rays
b. Ultraviolet rays
c. Infrared rays
d. Radio waves ✓
7. Visible waves have a wavelength range between:
a. 200 and 400 nm
b. 400 and 700 nm ✓
c. 500 and 800 nm
d. 700 and 900 nm
8. Hotter stars emit:
a. X-rays
b. Ultraviolet rays ✓
c. Infrared rays
d. Microwaves
9. X-rays wavelength ranges from:
a. 1 nm – 0.0001 nm
b. 1 nm – 0.001 nm
c. 1 nm – 0.1 nm ✓
d. 1 nm – 0.01 nm
10. The wavelength of gamma rays is less than:
a. 10⁵ m
b. 10⁶ m
c. 10⁸ m
d. 10-¹¹ m ✓
11. Newton proposed that light consist of minute particles, called:
a. tiny particles
b. corpuscles ✓
c. photon
d. energy atoms
12. The shortest wavelength visible to the human eye is:
a. violet ✓
b. red
c. blue
d. White
13. The longest wavelength visible to the human eye is:
a. violet
b. red ✓
c. blue
d. green
14. The orbit closest to the nucleus corresponds to the:
a. zero energy
b. lowest energy ✓
c. highest energy
d. none of these
15. Light consists of:
a. gamma rays
b. electromagnetic waves ✓
c. Atoms
d. X-rays
CHAPTER # 06ELECTRICITY
1.V = IR is mathematical expression of __________ law.a. Newton’s
b. Ohm’s ✓
c. Coulomb’s
d. None
2. e.m.f stands for _________.
a. electron motive force
b. electrical motive force
c. electro motive force ✓
d. None of these
3. The commercial unit of electrical energy is _______.
a. Joule
b. Kilowatt
c. Kilowatt /hour ✓
d. Watt
4. Coulomb volt is called ________.
a. Joule
b. Farad ✓
c. Newton
d. Watt
5. N/C is a unit of __________.
a. electrical field intensity ✓
b. capacitance
c. Inductance
d. Energy
6. “Work done is proportional to the heat dissipated in an electric circuit” this is called ________ law.
a. Joule's ✓
b. Kilowatt
c. Kilowatt /hour
d. Watt
7. In S.I system the unit of resistance is ___________.
a. Newton’s
b. Ohm’s ✓
c. Coulomb’s
d. None
8. The energy supplied to the electron to move round in the circuit is called __________.
a. Potential difference
b. current
c. e.m.f ✓
d. None
9. The unit of electric charge is _______.
a. Joule
b. coulomb ✓
c. Newton
d. Watt
10. 𝑱𝒐𝒖𝒍𝒆 / 𝒄𝒐𝒖𝒍𝒐𝒎𝒃 is unit of:
a. Potential difference ✓
b. current
c. e.m.f
d. None
11. The device which converts electrical energy into mechanical energy is called ________.
a. electric motor ✓
b. capacitor
c. resistor
d. None
12. In series circuit of two resistance Re = R1 + _______.
a. I
b. R2 ✓
c. V
d. None of these
13. The value of constant that occurs in coulomb's force formula is ________ Nm³/C³.
a. 9
b. 9.9
c. 0.009
d. 9 x 10⁹ ✓
14. The charge of an electron is _______.
a. 1.6 x 10¹⁹
b. 9.11 x 10¹⁸
c. 1.6 x 10-¹⁹ ✓
d. None
16. Farad is unit of ______.
a. current
b. P.d
c. capacitance ✓
d. None
17. The potential difference (p.d) is measured in _____.
a. m
b. Joule
c. Watt
d. Volt ✓
18. The force of attraction or repulsion between two charged particles is given by _______.
a. 𝐅 = 𝐤 𝐪𝟏𝐪𝟐 / 𝐫𝟐 ✓
b. F = ma
c. F = kx
d. None
19. The current which changes its direction and polarity is called _________.
a. Direct Current
b. Alternating current ✓
c. both a & b
d. None of these
20. The charge flowing through a conductor is called:
a. Volt
b. P.d
c. Electric current ✓
d. None
IMPORTANT VALUES
One milli Ampere = 10 -3 ampere
1 micro farad = 10⁹ farad.
1 mega Ohm = 1 × 10⁶ ohm.
One milli Ampere = 10 -3 ampere
1 micro farad = 10⁹ farad.
1 mega Ohm = 1 × 10⁶ ohm.
CHAPTER # 07MAGNETISM AND ELECTROMAGNETISM
1- Right hand rule was introduced by a ______ scientist.a. English
b. German ✓
c. Pakistani
d. Indian
2- The relation between electric current and magnetic field was discovered by _________.
a. Christian Ouersted ✓
b. Augusta de Coulomb
c. Faraday
d. Ohm’s
3- When a direct current is flowing in upward direction in a wire , the direction of magnetic lines of force will be:
a. Anti-clockwise ✓
b. Clock-wise
c. Only upward
d. Only downward
4- Shunt means ____________ in a galvanometer.
a. resistance
b. high resistance
c. low resistance ✓
d. Load
5- A copper wire in spiral shape called __________.
a. Coil/solenoid ✓
b. Ring
c. spring
d. None
6- Galvanometer is changed into Ammeter by connecting ______ in parallel.
a. resistance
b. high resistance
c. low resistance ✓
d. None of these
7- The Instrument used to measure potential difference is known as __________.
a. ammeter
b. Voltmeter ✓
c. AVO meter
d. None
8- ___________ is a surer test of magnetism.
a. Repulsion ✓
b. Attraction
c. Both a and b
d. None
9- Like poles of magnet ________ each other.
a. attract
b. repel ✓
c. Both a and b
d. None
10- An ammeter is always connected in _________ to measure the current in a circuit.
a. parallel
b. series ✓
c. Both a and b
d. None
11- If the flow of current at any end of a cell is anti-clock wise then this end will be a _______ pole.
a. North ✓
b. South
c. East
d. West
12- A freely suspended magnet always points in the ________ direction.
a. North
b. South
c. North-south ✓
d. None
13- ______ is a process by which a magnet losses its magnetism.
a. Heating
b. Beating
c. Passing A.C
d. All of these ✓
14- The magnetic lines of forces ___________ longitudinally.
a. expand
b. stress
c. contract ✓
d. None
15- A galvanometer is used to measure the magnitude and direction of _________.
a. small current ✓
b. large current
c. Small voltage
d. large voltage
16- Electric bell works over a principle of ________.
a. electricity
b. magnetism
c. electromagnetism ✓
d. None
17- Voltmeter is a modified form of ________.
a. calorimeter
b. ammeter
c. galvanometer ✓
d. None
18- Steel is an example of ___________.
a. Soft ferromagnetic substance
b. Hard ferromagnetic substance ✓
c. Ferromagnetic substance
d. None of these
19- A device which convert electrical energy into mechanical energy is called ________.
a. Electric motor ✓
b. Electric bell
c. Telephone
d. None
20- Loss of magnetic property of a magnet is known as ____________.
a. demagnetization ✓
b. magnetization
c. right hand rule
d. magnetic force
CHAPTER # 08ELECTRONICS
1- The semi conductor doped with a pentavalent element is called ________ substance.a. n-type ✓
b. P-type
c. mixed
d. None
2- The semi conductor doped with a trivalent element is called ________ substance.
a. n-type
b. P-type ✓
c. mixed
d. None
3- Holes are charge carriers in _______ material.
a. n-type
b. P-type ✓
c. Both a and b
d. None
4- In p-type semiconductor current is carried by:
a. negative charge
b. neutron
c. holes ✓
d. None
5- ___________ are exceedingly small, light, they are not easily broken and can be used at very small potentials.
a. Capacitor
b. Resistor
c. Bulb
d. Transistors ✓
6- When a semiconductor diode is reverse biased, electrons and holes will move ________ the p-n junction.
a. towards
b. away from ✓
c. in between
d. None
7- _______ is used to detect enemy planes.
a. Helicopter
b. Radar ✓
c. Aeroplane
d. None
8. The output of half wave rectifier is pulsating:
a. A.C
b. D.C ✓
c. both a and b
d. None
9. PN-Junction is behave as:
a. transistor
b. Electrode
c. diode ✓
d. None
10- Which one of the following is not a semi-conductor:
a. silicon
b. germanium
c. diamond ✓
d. Gallium
11- The charge carriers in n-type materials are:
a. negative ions
b. neutron
c. electron ✓
d. None
12- A typical example of a semiconductor is:
a. Platinum
b. germanium ✓
c. mica
d. quartz
13- An example of a pentavalent element is:
a. carbon
b. germanium
c. iridium
d. arsenic ✓
14- An example of trivalent element is:
a. arsenic
b. silicon
c. gallium
d. Indium ✓
15- A device that converts A.C into D.C is called:
a. oscillator
b. amplifier
c. rectifier ✓
d. None
16- A transistor can be used as:
a. Voltage amplifier
b. A current amplifier
c. an oscillator
d. All of these ✓
17- In half wave rectification, the number of diodes used are:
a. One ✓
b. Two
c. Three
d. Four
18- In full wave rectification, the number of diodes used are:
a. One
b. Two ✓
c. Three
d. Four
19- A central part of a transistor is known as:
a. emitter
b. base ✓
c. collector
d. Electrode
20- Germanium and silicon are the material used as:
a. conductors
b. insulators
c. semi-conductor ✓
d. None
CHAPTER # 09NUCLEAR PHYSICS
1-Proton is _______ times heavier than electron.a. 18.36
b. 183, 6
c. 1836 ✓
d. 0.1836
2- Radioactive substances are kept in box is made up of __________.
a. iron
b. lead ✓
c. aluminium
d. silver
3- _________ emits high energy gamma radiation to detect cracks in welding joints.
a. Uranium
b. Co-60 ✓
c. Polonium
d. all of these
4- The number of proton in a nucleus is called _______.
a. charge number ✓
b. mass number
c. both a & b
d. None of these
5- __________ has shortest wavelength.
a. Alpha rays
b. Beta rays
c. Gamma rays ✓
d. All of these
6- ________ rays are not deflected by an electric or magnetic field.
a. Alpha
b. Beta
c. Gamma ✓
d. None
7- The emission of invisible radiation from uranium is called __________ .
a. radioactivity ✓
b. fission
c. fusion
d. All of them
9- The system which controls nuclear fission reaction is called _________.
a. Nuclear reactor ✓
b. Alternator
c. both a and b
d. None of these
10- Laser is in the field ________ .
a. Atomic physics ✓
b. Nuclear physics
c. Classical Physics
d. Electronics
11- _________ has been found effective for the treatment of leukaemia.
a. Radio phosphorus ✓
b. Silicone
c. Both a & b
d. None of these
12- The splitting of nucleus of atom is called _________.
a. Fusion ✓
b. Radioactivity
c. Annihilation
d. Fission
13- _________ has been widely used to remove cancerous tumors inside the body.
a. Silicon
b. Co-60 ✓
c. Polonium
d. all of these
14- Hydrogen bomb works on principles of ________.
a. Fission
b. Fusion ✓
c. Both a & b
d. None
15- The rays consisting of electrons are called _______.
a. Alpha rays
b. Beta rays ✓
c. Gamma rays
d. All of these
16- Einstein proposed the theory of matter and energy according to the equation:
a. Em = c²
b. E/m = c²
c. m = Ec²
d. E = mc² ✓
17- The system used to obtain a controlled amount of heat from nuclear fission is called ________.
a. Nuclear reactor ✓
b. Alternator
c. both a and b
d. None of these
18- The mass of proton is nearly equal to the mass of __________.
a. Electron
b. Proton
c. Neutron ✓
d. None
19- In ________ reaction two lighter nuclei are combined to form a heavy nucleus.
a. Fission
b. Fusion ✓
c. Both a & b
d. None
20- __________ is the mass required for smooth chain reaction.
a. Calculated mass
b. Any mass
c. Critical mass ✓
d. None
21- The time within which half of the atom of an electron decay is called ___________.
a. half life ✓
b. completed life
c. double life
d. None
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