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9.	Which one of the following reactions is the main cause of the energy radiation from the Sun?
	A.  Diffusion reaction
	B.  Chemical reaction
	C.  Fission reaction
	D.  Fusion reaction

Answer

Ans: D Fusion reaction

10.	Which one of the following remains constant while throwing the ball upward?
	A.  Acceleration
	B.  Kinetic energy
	C.  Force
	D.  Velocity

Answer

Ans: A Acceleration

11.	What type of electromagnetic radiation is used in the remote control of a television?
	A.  Ultraviolet
	B.  Infrared
	C.  None of these
	D.  Visible

Answer

Ans: B Infrared

12.	Dynamo is a machine which is used for conversion of
	A.  Electrical energy to mechanical energy
	B.  Mechanical energy to electrical energy
	C.  High voltage to low voltage
	D.  Low voltage to high voltage

Answer

Ans: B Mechanical energy to electrical energy