10th Class Physics 1st Quarter Book Paper

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

1. Running warm water over a tight metal lid of a jar helps to open it because:

   1. The glass jar expands

   2. The metal lid expands slightly

   3. The liquid inside freezes

   4. The lid contracts

2. Thermal radiation travels in the form of:

   1. Sound waves

   2. Water waves

   3. Electromagnetic waves

   4. Vibrating atoms

3. The maximum displacement of a point on a wave from its rest position is the:

   1. Wavelength

   2. Frequency

   3. Amplitude

   4. Time period

4. When the temperature of a rod of copper is increased, its length:

   1. Remains the same

   2. Increases

   3. Decreases

   4. Becomes double

5. The natural phenomenon caused by convection current is:

   1. Earthquakes

   2. Land and sea breezes

   3. Magnetic fields

   4. Solar eclipses

6. Which are the fastest seismic waves and the first to be detected during an earthquake?

   1. Secondary waves

   2. Surface waves

   3. Primary waves

   4. Tidal waves

7. Which substance has the highest melting point?

   1. Aluminum

   2. Gold

   3. Copper

   4. Lead

8. Which of the following gases acts to trap heat in the Earth's atmosphere?

   1. Oxygen

   2. Nitrogen

   3. Carbon dioxide

   4. Hydrogen

9. The number of complete wave cycle that pass a fixed point in one second is the:

   1. Time period

   2. Wave speed

   3. Frequency

   4. Amplitude

10. At what temperature does lead become a superconductor?

    1. Below 4.2 k

    2. Below 7.2 k

    3. At 35 degree

    4. At 0 degree

11. Radiators used for heating rooms have thin slots or fins to increase their:

    1. Weight

    2. Density

    3. Surface area

    4. Thickness

12. The highest points of a transverse wave are known as ...... .

    1. Troughs

    2. Compressions

    3. Rarefactions

    4. Crests