Q.31)-Which of the following have the same unit?
- Work and power
- Torque and moment of inertia
- Work and torque
- Torque and angular momentum
Q.32)-Which of the following is the second largest source of global energy?
- Fossil fuel
- Nuclear energy
- Renewable energy
- None of these
Q.33)-The inexhaustible source of energy of stars is due to
- Conversion of hydrogen to helium
- Conversion of helium to hydrogen
- Decay of radioactive elements
- Excess of oxygen
Q.34)-Which of the following reaction is the main cause of energy radiated from sun?
- Nuclear fission
- Nuclear fusion
- Chemical reaction
- Diffusion reaction
Q.35)-Energy in the foods can be measured in which units?
- Kelvin
- Joule
- Calorie
- Celsius
Q.36)-A flying jet possesses
- Potential energy
- Kinetic energy
- Wind energy
- Both kinetic and potential energy
Q.37)-When the speed of a moving object is halved, its
- Kinetic energy becomes 1/4 of the original
- Kinetic energy becomes 4 times the original
- No change in the kinetic energy
- Acceleration is doubled
Q.38)-By the use of photovoltaic cell while converting solar energy which of the following is produced?
- Light energy
- Electric energy
- Chemical energy
- Heat energy
Q.39)-When a ball is thrown vertically upwards, which of the following quantities remains constant during its motion?
- Energy
- Displacement
- Velocity
- Acceleration is doubled
Q.40)-What is the SI unit of heat energy?
- Joule
- Newton
- Calorie
- Kelvin