9th Class Physics 2nd Quarter Book Paper

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

1. Resources of energy which are replaced by new ones after their use are called:

   1. Non-renewable energy

   2. Renewable energy sources

   3. Natural energy sources

   4. Fossil fuels

2. A spanner 25 cm long is used to open a nut. If a force of 400 N is applied at the end of a spanner what is the torque acting on the nut:

   1. 98 Nm

   2. 100 Nm

   3. 150 Nm

   4. 1600 Nm

3. What is the pressure of Sun's center?

   1. 

   2. 

   3. 

   4. 

4. A body of mass 2 kg is placed on the table 100 cm high, the value of its kinetic energy is:

   1. 50 joule

   2. 40 joule

   3. 400 joule

   4. zero joule

5. The mathematical form of the second condition of equilibrium is:

   1. 

   2. 

   3. 

   4. 

6. The pressure exerted by a man on the surface of earth will be smaller when he:

   1. Stands on both feet

   2. Sits on the ground

   3. Stands on one leg

   4. Sleeps on the ground

7. The world solar challenge race in:

   1. Dubai (1994)

   2. France (1998)

   3. Darwin, Australia (1993)

   4. Nepal (1992)

8. A body is in stable equilibrium when its centre of gravity:

   1. Is at its heightest position

   2. Is situated at its bottom

   3. Is at lowest position

   4. Keeps its height if displaced

9. The materials are elastic up to a certain limit known as:

   1. Deforming force

   2. Extension

   3. Elastic limit

   4. None of these

10. Hot rocks are present in the semi molten form deep under the surface of the Earth have temperature is:

    1. 150^oC

    2. 200^oC

    3. 250^oC

    4. 300^oC

11. Racing cars made stable by:

    1. Increasing their speed

    2. Decreasing their mass

    3. Lowering their centre of gravity

    4. Decreasing their width

12. The mass can be easily measured by:

    1. Spring balance

    2. Physical balance

    3. Both A and B

    4. None of these