KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 116 - 119 of 250

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Question number: 116

» Kinetic Theory of Gases » Kinetic Theory of Gases

Appeared in Year: 2013

MCQ▾

Question

The average distance between molecules of an ideal gas at STP is approximately of the order of,

Choices

Choice (4) Response
a.

100 nm

b.

1 nm

c.

100 cm

d.

1 μm

Question number: 117

» Work, Energy and Power » Conservation of Mechanical Energy

Appeared in Year: 2014

MCQ▾

Question

A solid cylinder P rolls without slipping from rest down an inclined plane attaining a speed vp at the bottom. Another smooth solid cylinder Q of same mass and dimensions slides without friction from rest down the inclined plane attaining a speed vq at the bottom. The ratio of the speeds vpvq is –

Choices

Choice (4) Response
a.

(43)

b.

(32)

c.

(34)

d.

(23)

Question number: 118

» Laws of Motion » Impulse

Appeared in Year: 2014

MCQ▾

Question

A uniform thin rod of length 2L and mass m lies on a horizontal table. A horizontal impulse J is given to the rod at one end. There is no friction. The total K. E. of the rod just after the impulse will be:

Choices

Choice (4) Response
a.

6J2m

b.

J22m

c.

2J2m

d.

J2m

Question number: 119

» Dual Nature of Matter and Radiation » De-Broglie Relation

Appeared in Year: 2013

MCQ▾

Question

Photons of energy 7 eV are incident on two metals A and B with work functions 6 eV and 3 eV respectively. The minimum de Broglie wavelengths of the emitted photoelectrons with maximum energies are λA and λB, respectively where λAλB is nearly,

Choices

Choice (4) Response
a.

4.0

b.

0.5

c.

2.0

d.

1.4

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