Home / Work, Power & Energy – 1 – 2

Work, Power & Energy – 1 – 2

6. Work done is maximum when force is _______ to displacement.

(a) Equal
(b) Perpendicular
(c) Opposite
(d) Parallel

Answer
Answer : (d)

Explanation
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7. The units of work are the same as those of :

(a) Power
(b) Energy
(c) Force
(d) Mass

Answer
Answer : (b)

Explanation
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8. The rate of doing work is called :

(a) Energy
(b) Power
(c) Force
(d) Inertia

Answer
Answer : (b)

Explanation
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9. The SI unit of power is :

(a) Joule
(b) Erg
(c) Dyne
(d) Watt

Answer
Answer : (d)

Explanation
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10. In the vector form power is expressed as :

(a) P = F . V
(b) P = F x V
(c) P = V x F
(d) P = F . d

Answer
Answer : (a)

Explanation
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