Question :

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

Answer : A

Description :



Related Questions - 1


Pick out the scalar quantity


A) force
B) pressure
C) velocity
D) acceleration

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Related Questions - 2


Of the following properties of a wave, the one that is independent of the other is its


A) amplitude
B) velocity
C) wavelength
D) frequency

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Radiocarbon is produced in the atmosphere as a result of


A) collision between fast neutrons and nitrogen nuclei present in the atmosphere
B) action of ultraviolet light from the sun on atmospheric oxygen
C) action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D) lightning discharge in atmosphere

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Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2


A) 0.14 m/s
B) 140 m/s
C) 1.4 km/s
D) 14 m/s

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Light from the Sun reaches us in nearly


A) 2 minutes
B) 4 minutes
C) 8 minutes
D) 16 minutes

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