Work, Energy and Power (AIIMS Physics): Questions 6 - 10 of 25

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Question number: 6

» Work, Energy and Power » Power

MCQ▾

Question

A body moves along the straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to: -

Choices

Choice (4) Response

a.

r12

b.

t32

c.

t43

d.

t2

Question number: 7

» Work, Energy and Power » Kinetic Energy

Appeared in Year: 2004

MCQ▾

Question

A bomb of mass 3.0 kg explodes in air into two pieces of masses 2.0 kg and 1.0 kg. The smaller mass goes at a speed of 80ms . The total energy imparted to the two fragments is – [AIIMS]

Choices

Choice (4) Response

a.

4.8 kJ

b.

2.4 kJ

c.

1.07 kJ

d.

2.14 kJ

Question number: 8

» Work, Energy and Power » Work-Energy Theorem

Appeared in Year: 2003

MCQ▾

Question

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be –

Choices

Choice (4) Response

a.

920KeV

b.

1 KeV

c.

11840KeV

d.

1840KeV

Question number: 9

» Work, Energy and Power » Work-Energy Theorem

Appeared in Year: 2009

Assertion-Reason▾

Assertion (Ꭺ)

The change in kinetic energy of a particle is equal to the work done on it by the net force.

Reason (Ꭱ)

Change in kinetic energy of particle is equal to the work done only in case of system of one particle.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

Question number: 10

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A bomb of mass 5.0 kg explodes in air into two pieces of masses 2.0 kg and 3.0 kg. The smaller mass goes at a speed of 120ms . The total energy imparted to the two fragments is –

Choices

Choice (4) Response

a.

36 kJ

b.

48 kJ

c.

12 kJ

d.

24 kJ

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