Work, Energy and Power-Potential Energy (KVPY Stream-SA (Class 11) Physics): Questions 1 - 3 of 3

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Question number: 1

» Work, Energy and Power » Potential Energy

MCQ▾

Question

Potential energy of a spring when stretched by 8 cm is U. When stretched by 32 cm, its potential energy will be,

Choices

Choice (4) Response
a.

4U

b.

16U

c.

U4

d.

U16

Question number: 2

» Work, Energy and Power » Potential Energy

MCQ▾

Question

In a molecule, the potential energy between two atoms is given as: U(x)=ax14bx7 , where a and b are positive constant and x is the distance between atoms. For stable equilibrium of atom, the value of x is –

Choices

Choice (4) Response
a.

[2ab]17

b.

[11a5b]17

c.

[a2b]17

d.

Zero

Question number: 3

» Work, Energy and Power » Potential Energy

MCQ▾

Question

Potential energy of a spring when stretched by 5 cm is U. When stretched by 15 cm, its potential energy will be,

Choices

Choice (4) Response
a.

U3

b.

3U

c.

9U

d.

U9

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