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5.	Sound travels in the form of
	A.  Stationary waves
	B.  Longitudinal waves
	C.  Transverse waves
	D.  None of the above

Answer

Ans: B Longitudinal waves

6.	In television broadcast, the picture signals are transmitted by
	A.  Phase modulation
	B.  Angle modulation
	C.  Amplitude modulation
	D.  Frequency modulation

Answer

Ans: D Frequency modulation

7.	A dynamo which is said to generate electricity actually acts as a
	A.  Source of electric charge
	B.  Converter of energy
	C.  Source of ions
	D.  Source of electrons

Answer

Ans: B Converter of energy

8.	Radioactivity was discovered by
	A.  Bohr
	B.  Madame Curie
	C.  Henry Becquerel
	D.  Rutherford

Answer

Ans: C Henry Becquerel