Introduction to Light Quiz Questions and Answers PDF Download - 29

_______ is a form of energy.

1. Force
2. Acceleration
3. Light
4. Speed

Specific latent heat of fusion is

1. the amount of heat required to raise the temperature of a 1 kg of a substance by 1 K
2. the amount of heat required to change the phase of a substance from solid to liquid without any change in temperature
3. the amount of heat required to change the phase of a 1 kg of substance from solid to liquid without any change in temperature
4. the amount of heat required to change the phase of a 1 kg of substance from liquid to gas without any change in temperature

An object is lifted 5 m above the levelled ground, the mass of the object is 20 kg and the gravitational pull is 10 N kg^-2, the E_p of the object is

1. 40 J
2. 1000 J
3. 2.5 J
4. 0.4 J

A piece of carbon of mass 0.40 kg requires thermal energy of 20 J to get heated from a temperature of 5 °C to 9 °C, the specific heat capacity of the carbon would be

1. 1.25 J kg^-1 °C^-1
2. 12.5 J kg^-1 °C^-1
3. 125 J kg^-1 °C^-1
4. 1250 J kg^-1 °C^-1

Periodic time of a simple pendulum depends on

1. The mass of the pendulum bob
2. The collective mass of the pendulum bob and thread
3. The length of the pendulum
4. None of the above