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Atoms and Electrons – 2 – 1

51. Mass of a proton is :

(a) 1.67 × 10^–24 kg
(b) 1.67 × 10^–25 kg
(c) 1.67 × 10^–26 kg
(d) 1.67 × 10^–27 kg

ANSWER

EXPLANATION

52. The kinetic energy of a bounded electron is …….. that of an unbounded electron.

(a) Less than
(b) Twice than
(c) Greater than
(d) Same as

ANSWER

EXPLANATION

53. Coulomb’s law for the force between electric charges most closely resembles with :

(a) Newton’s law of motion
(b) Law of conservation of energy
(c) Gauss theorem
(d) Newton’s law of gravitation

ANSWER

EXPLANATION

54. When separation between two charges is increased, the potential energy :

(a) Increases
(b) Decreases
(c) Remains constant
(d) Either a or b

ANSWER

EXPLANATION

55. The transferred-electron bulk effect occurs in :

(a) Germanium
(b) Gallium arsenide
(c) Silicon
(d) Metal-semiconductor junction

ANSWER

EXPLANATION

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