X Physics

SECTION “A” – (Multiple Choice Questions)

i. 1 microfarad =

• 10⁻⁴
• 10⁻⁵
• 10⁻⁶

ii. Physical balanced is used for measurement of

• Speed
• Mass
• Velocity
• Sound

iii. The angle between the rectangular component of a rector is

• 70°
• 80°
• 90°
• 100°

iv. The semi conductor doped with pentavalent elements are called.

• N-type substances
• P-type substances
• S-type
• L-type

v. A humna ear cannot hear a sound of frequency more than

• 20KHZ
• 30KHZ
• 40KHZ
• 50KHZ

vi. If the speed of a body is doubled, its kinetic energy becomes?

• 3 times
• 4 times
• 5 times
• 6 times

vii. Speed of lights in air is ________

• 3 x 10⁸m/s
• 4 x 10⁸m/s
• 2 x 10⁻⁸m/s
• 5 x 10⁸m/s

viii. One nano second is equal to

• 10⁻⁷
• 10⁻⁸
• 10⁻⁹

ix. The relation between the electric current and the magnetic field was discovered by

• Fleming
• J.J. Thomson
• Al-beruni
• None of them

x. Holes are the change carries on which type of material.

• T
• P
• 5
• N

xi. The wavelength of red light is ______ then wavelength of violet light.

• Less
• Very Less
• Greater
• None of them

xii. Joule/Coulomb is the unit of

• Electric potential
• Velocity
• Speed
• Mass

xiii. The value of G = 6.67 x 10

• Nm2kg⁻2
• Nm3kg⁻3
• Nm3kg⁻⁴
• Nm⁵kg⁻⁵

xiv. The commercial unit of electric energy is

• Kilowatt-hour
• Kilowatt-time
• Kilowatt-speed
• Kilowatt-velocity

xv. The image formed by a mirror is always virtual, erect and smaller than the object itself.

• Convex
• Concave
• Plane
• Sound

xvi. The number of protons in a nucleus is called

• Atomic Number
• Mass Number

xvii. The device which collects the change is

• Ammeter
• Capacitor
• Di-electric
• Heater

SECTION “B” – (Short Answer Questions)

Q.2. Describe the short sightedness and longsightedness. How are these defects removed?

Q.3. Find the focal length of a convex lens if P = 5cm, q = 10cm and the image is virtual.

Q.4. Write these uses of radar.

Q.5. Define the following.

i. Centripetal Force
ii. Coefficient of friction
iii. Regelation

Q.6. A car is moving on a straight road at 5/ms it accelerated at 3m/s. Calculate its velocity after the 4 seconds.

Q.7. Write advantages and disadvantages of friction.

Q.8. Define Lever. Write down its kinds.

Q.9. State the law of conservation of energy and prove it with the help of an example.

Q.10. Define Momentum and state the Law of Conservation of Momentum.

Q.11. Write down the three contribution of Alberuni.

Q.12. What is a Capacitor? Write the factors on which its capacity depends.

Q.13. State Pascal’s Law and its application.

Q.14. Define Nuclear Fission and describe the chain reaction.

Q.15. How can a galvanometer be converted into ammeter voltmeter?

Q.16. A 100 watt bulb operates in a 220 volt circuit. Find the current passing through the circuit.

Q.17. Differentiate between Speed and Velocity.

Q.18. Drive the equation Me = gr2/G to determine the mass of earth by applying the law of gravitation.

Q.19. A force of 20N is applied at the edge of a wheel of radius 40cm. Find the Torque acting on the wheel.

Q.20. Write down the construction of a transistor and describe its function as an amplifier.

Q.21. Define Scalar and Vector quantities and give example.

Q.22. Describe the quantum theory of light.

SECTION “C” – (Detailed Answer and Question)

Q.23. (a) Derive the equation S = Vit + 1/2 at2
Q.23. (b) Define stree, strain and state Hooke’s Law and write the formulae of young’s modulus of elasticity.
Q.23. (c) Define Resolution of vector. How vector resolved into its component.

Q.24. (a) What is machine? Define its Mechanical Advantage. Draw the diagram of a inclined plane and wheel and Axle and write the formulae for their mechanical advantages.
Q.24. (b) Define wavelength and frequency and drive the relation f =V/λ where V is wave velocity.
Q.24. (c) Write the effect of pressure on boiling of a liquid and the melting point of a solid.

Q.25. (a) State Newton’s law of Motion and give one example of each of the first and third law.
Q.25. (b) Draw the ray diagram of the image formed by a Plane Mirror and its characteristics.
Q.25. (c) Define Kinetic energy and drive the relation K.E = 1/2 mv2