a2zinterviews

25.	Sound travels fastest in
	A.  Vacuum
	B.  Metal
	C.  Air
	D.  Liquid

Answer

Ans: B Metal

26.	Which of the following is the instrument used to measure atmospheric pressure?
	A.  Hydrometer
	B.  Barometer
	C.  Eudiometer
	D.  Pyrometer

Answer

Ans: B Barometer

27.	The unit of current is
	A.  Ampere
	B.  Ohm
	C.  Coulomb
	D.  Volt

Answer

Ans: A Ampere

28.	The potential difference in electric circuit is
	A.  220 V
	B.  230 V
	C.  240 V
	D.  250 V

Answer

Ans: A 220 V