PHYSICS II - FOR CLASS X (Science Group) - Solved Preparation Paper 2024 - By Sir Wasim Ahmad

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PHYSICS II
For Class X (Science Group)
Solved Preparation Paper 2024

By Sir Wasim Ahmad

CHAPTER # 10: General Waves Properties

Ql. Write three differences between Transverse waves and longitudinal waves?
Q2. Define the following terms of a wave:

1. amplitude
2. frequency
3. period
4. damped oscillation
5. Diffraction

Q3. What is wave front? Write its two types.
Q4. Differentiate between Mechanical and Electromagnetic Waves.
Q5. Derive the formula of wave speed, ⅴ = fλ
Q6. Define S.H.M. Write its necessary conditions?
Q7. What is Simple Pendulum? Show that the motion of Simple Pendulum is Simple harmonic.
Q8. With the help of a diagram, explain SHM in the ball and bowl system.
Q9. What will be the effect of the period of a simple pendulum if there is an increase in its:

1. Length
2. Mass
3. Amplitude

For SOLUTION OF CHAPTER # 10 CLICK HERE

CHAPTER # 11: Sound

Ql. Write down three differences between Sound and Noise.
Q2. What are Ultrasounds? Explain two applications of Ultrasound that are used in Hospital.
Q3. Define the characteristics of musical sound.
Q4. With the help of diagram, prove that .sound waves are mechanical waves.
Q5. Explain the working and application of a sonar.
Q6. Explain the effect of the Temperature and Humidity on the speed of sound in the air.
Q7. Define Followings:

1. Echo
2. Ultrasonic Waves
3. Infrasonic Waves

For SOLUTION OF CHAPTER # 11 CLICK HERE

CHAPTER .# 12: Electromagnetic Spectrum

Ql. Write three characteristics of electromagnetic waves.
Q2. How do the molecules emit infrared radiations? How intruder alarms help security personnel visualize the thermal images.
Q3. X-rays are used to detect cracks in metals. Explain how?
Q4. Explain the applications of gamma rays used in hospitals for medical imaging.
Q6. Describe Sources and Applications of Electromagnetic Waves.
Q7. Describe the Source, Properties and Applications Of Radio waves and. Microwaves and X-rays.
For SOLUTION OF CHAPTER # 12 CLICK HERE

CHAPTER # 13: Geometrical Optics

Q1. Write down Uses of Spherical Mirror.
Q2. Define Following:

1. Critical Angle
2. Refractive Index
3. Snell's Law
4. Angle of Deviation
5. Dispersion of light
6. Power of Lens
7. Resolving Power
8. Near Point of The Eye
9. Far Point of the Eye

Q4. Describe the construction and working of Projector with the help of ray diagram.
Q5. With the help of ray diagram, describe the construction and working of compound microscope.
Q6. With the help of ray diagram, discuss the defects of vision and their correction.
Q7. Describe total internal reflection with the help of diagram, write down its conditions and Uses.
For SOLUTION OF CHAPTER # 13 CLICK HERE

CHAPTER # 14: Electrostatics

Ql. Explain how an electroscope is built and how it operates.
Q2 State Coulomb's Law and derive its equation.
Q3. Define Capacitance of capacitor write down its formula and units. Write two factors affecting capacitance of a capacitor and uses of capacitors.
Q4. Explain how electric charge can be generated and measured in very simple experiments.
Q5. Define Following:

1. Electrostatic Potential
2. Electrical Intensity
3. Electrical Field
4. Electromotive Force.

For SOLUTION OF CHAPTER # 14 CLICK HERE

CHAPTER # 15: Current Electricity

Ql. State Ohm's law. Derive its formula. Write four limitations of Ohm's law.
Q2. Define Resistance of Conductor. Discuss the Factors on which it depends.
Q3. Three resistors RI, R2 and R3 connected in parallel. With the help of circuit diagram, derive the formula for their equivalent resistance.
Q4. Write advantages and disadvantage of parallel and series combination of resistance.
Q5. What is an electric Power? Derive and explain Power dissipation in a resistor (Derive P = V² /R)
Q6. Explain Joule's law and the process of energy dissipation in a resistance?
Q6. How is a galvanometer converted into an ammeter and voltmeter?
For SOLUTION OF CHAPTER # 15 CLICK HERE

CHAPTER # 16: Electromagnetism

Ql. Describe Magnetic Force on Charged Particle in Magnetic Field.
Q2. Describe turning effect on a current carrying coil in a magnetic field with diagram.
Q3. What is Electromagnetic Induction and induced emf? Write two factors on which induced emf in a coil depends.
Q6. What is electric motor? Briefly explain the construction and working of D.C motor.
Q7. What is transformer? On which principle does it Work? Explain briefly its types.
Q8. Write down any three daily life applications of Transformer.
Q9. Can a transformer work on direct current? Justify your answer.
For SOLUTION OF CHAPTER # 16 CLICK HERE

CHAPTER # 17: Introductory Electronics

Ql. What is Cathode Ray Oscilloscope? Also describe the basic principle and working with diagram.
Q2. Name any one device that uses an electron beam. Also write two properties of cathode rays.
Q3. Write three differences between analogue and digital electronics.
Q4. What are logic gates? Define OR gate and NAND gate with circuit symbol and truth table for two input variables.
For SOLUTION OF CHAPTER # 17 CLICK HERE

CHAPTER # 18: Information and Communication Technology ICT

Q1. What do you mean by storage device? Name any two storage devices.
Q2. What is internet. Describe its main services and uses.
Q5. What are the components of information technology? Clearly indicate the Functions of each components.
Q4. What is the difference between hardware and software? Name different software?
For SOLUTION OF CHAPTER # 18 CLICK HERE

CHAPTER # 19: Atomic Structure

Ql. Define Atomic mass. Also find Number of protons and Neutron in Latium (₃Li⁷).
Q2. Explain the α- scattering experiment of atomic model.
Q4. Describe Rutherford's model of an atom.
Q5. What are Isotopes, give example. Why their physical properties are same but chemical properties are different.
For SOLUTION OF CHAPTER # 19 CLICK HERE

CHAPTER # 20: Nuclear Structure

Ql. Describe Rutherford experiment for the separation of Radioactive rays.
Q2. Define following:

1. Radioactivity
2. Half Life
3. Radioisotope
4. Radioactive Dating
5. Background Radiation
6. Cosmic Radiations

Q3. Write down Properties of Alpha and Beta rays Or Difference between them.
Q4. What are radioisotopes Describe uses in following:

1. Medicine
2. Industry
3. agriculture.

Q5. What is nuclear transmutation? What are the nuclear changes in parent nucleus when it decays an α-Particle, positive β-particle and negative β-particle? Give one example for each.
Q6. Difference between Fission and Fusion along with relevant nuclear equations.
For SOLUTION OF CHAPTER # 20 CLICK HERE

NUMERICAL

1) Pendulum clocks with a pendulum measuring out the passing of a second, what length of a pendulum is required to have a period of 1 second? g = 9.8 m/s².
2) Two waves pass through a point in 0.8 sec traveling with a speed of 4 m/s.

1. What is the time period and frequency of the wave?
2. Calculate the wavelength of the wave.

3) Calculate the speed of sound in air at 30°C? Given that speed of sound at 0°C is 331 m/s.
4) Electromagnetic radiation having a 15.0 μm wavelength is classified as infrared radiation. What is its frequency? Given that the speed of light is 3 x 10⁸ m/s.
5) The distance from earth to sun is 1.49 x 10¹¹ meters. How long a radio pulse radiated from the sun takes to reach on the earth? (496.67 see)
6) Calculate the value of critical angle for water refracted angle at 90°. The refractive index of water is 1.33
7) A concave lens of focal length 20 cm forms image 15 cm from the lens. Determine the power of the lens. Also Find how far the object is positioned from the lens.
8) An object is placed 15 cm away from a converging lens of a focal length of 10 cm. Determine the position, size, and nature of the image formed.
9) Calculate the coulomb's force between two protons 10 cm apart from each other? Charge on proton is 1.69 x 10^-19 C and K = 9.0 x 10⁹ N-m²/C²
10) Calculate the force acting on a charge of 3 microC, when the electric field intensity is 5 N/C.
11) What is the charge on the capacitor, if a 40 PF capacitor has a potential difference of 6 V across it?
12)100 J of heat is produced each second in a 452 resistance. Find the potential difference across the resistor.
13) When the current in a pocket calculator is 0.0002 A, how much charge flows every minute?
14) Calculate the potential difference between two points A and B if it takes 9x10⁴ J of external work to move a charge of +9 μ C from A to B.
15) A 220 V circuit is used to power two 120 watt and 80 watt light bulbs. Which bulb has the greater resistance and which one has the higher current? (80 W)
16) Three resistors of 4Ω, 6Ω and 12Ω are connected in parallel and then connected to a 6V emf source. Determine the value of:

1. The circuit's equivalent resistance.
2. The total current flowing through the circuit. (1.5A, 1A, 0.5A)
3. The currect that flow through each resistance.

17) A square loop of wire of side 2.0 cm carries 2.0 A of current. A uniform magnetic field of magnitude 0.7 T makes an angle of 300 with the plane of the loop. What is the magnitude of torque on the loop?
18) A transformer converts 220 volts supply into 6 volts supply. If the number of turns on the primary coil is 2200. then calculate the number of turns on the secondary coil.
19) Calculate the force on the wire of length 5 cm carrying current of 20A perpendicularly in magnetic field of 1.50T?
20) Distances in space are often measured in units of light-years, the distance light travels in one year. Find the distance in kilometers in a light year.
21) A sample of Ac-225 originally contained 8.0 x 10²⁴ nuclei. After 960 hours, how much of the original sample remains un-decayed. The half-life of the isotope is ten days.
22) How long will it take to decay for 36.0 mg of. Ra-226 to leave 4.5 mg? The half-life of the isotope is 1600 years.
23) How long will it take for 25% of the C-14 atoms in a sample of C-14 to decay Half-life of the sample, Tin = 5730 years.
For SOLUTION OF Numericals CLICK HERE