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