Physics GK Questions

Physics GK

Q.13 Metals are good conductors of electricity because

(A) they contain free electrons

(B) the atoms are lightly packed

(C) they have high melting point

(D) All of the above

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Q.14 Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

(A) will overflow

(B) will not rise

(C) depressed

(D) change its meniscus

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Q.15 Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?

(A) Pressure and Young's modules

(B) Planck's constant and Angular momentum

(C) Impulse and moment of force

(D) Force and rate of change of linear momentum

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Q.16 If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same

(A) velocity

(B) momentum

(C) acceleration

(D) kinetic energy

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Q.17 Pick out the scalar quantity

(A) force

(B) pressure

(C) velocity

(D) acceleration

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Q.18 Rectifiers are used to convert

(A) Direct current to Alternating current

(B) Alternating current to Direct current

(C) high voltage to low voltage

(D) low voltage to high voltage

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