Work, Energy and Power-Work Done [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 29 - 32 of 67

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Question 29

Question MCQ▾

A body is acted upon by a force F =-i + 2j + 3k. The work done by the force in displacing it from (0,0, 0) to (0,0, 4m) will be

Choices

Choice (4)Response

a.

8 J

b.

12 J

c.

10 J

d.

6 J

Edit

Question 30

Question MCQ▾

For a reversible process, unnecessary conditions are

(1) In the whole cycle of the system, the loss of any type

(2) That the process should be too fast

(3) That the process should be slow so that the working substance should remain in thermal and mechanical equilibrium with the surroundings

(4) The loss of energy should be zero and it should be quasi-static

Select the correct answers and mark it according to the following is:

Choices

Choice (4)Response

a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1,2 and 3 are correct

d.

1 and 2 are correct

Edit

Question 31

Appeared in Year: 2016

Question MCQ▾

A particle moves from a point to when a force of is applied. How much work has been done by the force?

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 32

Question MCQ▾

A spring of spring constant is stretched initially from the unscratched position. How much the work required to stretched it further by another ?

Choices

Choice (4)Response

a.

b.

c.

d.

Edit