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Q:

A transformer can do all of the following except

A) step­-up a/c voltage B) step­-up a/c current
C) step­-up a/c power D) step­-down a/c voltage
 
Answer & Explanation Answer: C) step­-up a/c power

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1 1418
Q:

For every action, there is an equal and opposite reaction, is Newton's

A) First law B) Second law
C) Third law D) Fourth law
 
Answer & Explanation Answer: C) Third law

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2 1416
Q:

Which one of the following processes is responsible for the glittering of air bubble rising through water?

A) Reflection of light B) Refraction of light
C) Total internal reflection of light D) Scattering of light
 
Answer & Explanation Answer: C) Total internal reflection of light

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1 1415
Q:

Which one of the following physical quantities has the same dimensions as that of Planck’s constant h?

A) Linear momentum B) Angular momentum
C) Force D) Potential energy
 
Answer & Explanation Answer: B) Angular momentum

Explanation:

In S.I. System unit of angular momentum is "joule.Second".

SI unit of Planck's constant is joule-seconds(j-s).

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1 1414
Q:

Which term is not associated with sound wave?

A) Hertz B) Decibel
C) Candela D) Mach
 
Answer & Explanation Answer: C) Candela

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1 1413
Q:

If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?

A) Concave B) Convex
C) Cylindrical D) Plane
 
Answer & Explanation Answer: A) Concave

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3 1411
Q:

An object with a mass of 22 kg moving with a velocity of 5 m/s possesses a kinetic energy of :

A) 275 J B) 110 J
C) 2750 J D) 110 J
 
Answer & Explanation Answer: A) 275 J

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1 1407
Q:

Washing machines and microwave oven are operated by _______________ embedded inside these gadgets.

A) Satellites B) Electronic Device
C) e-books D) Internet
 
Answer & Explanation Answer: B) Electronic Device

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