NEET Physics: Questions 927 - 931 of 2099

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Question number: 927

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

Three equal weights of mass m each are hanging on a string passing over a fixed pulley as shown in fig. The tensions in the string connecting weights A to B and B to C will respectively be -

Three equal weights of mass m each are hanging on a string

Three Equal Weights of Mass M Each Are Hanging on a String

Pulley with 3 weights on the string

Choices

Choice (4) Response
a.

23mg,23mg

b.

43mg,23mg

c.

23mg,43mg

d.

32mg,34mg

Question number: 928

» Work, Energy and Power » Power

MCQ▾

Question

The power output of a 92 U 235 reactor if it takes 30 days to use up 2 kg of fuel and if each fission gives 185 MeV of energy (Avogadro number = 6 x 10 23 /mole) will be –

Choices

Choice (4) Response
a.

58.4 MW

b.

584 W

c.

5.84 MW

d.

5840 MW

Question number: 929

» Work, Energy and Power » Work Done

MCQ▾

Question

A force F = (7 - 2x + 3x 2) N is applied on a 2 kg mass which displaces it from x = 0 to x = 2 m. Work done in joule is -

Choices

Choice (4) Response
a.

7

b.

3

c.

2

d.

13

Question number: 930

» Work, Energy and Power » Elastic and Inelastic Collisions

MCQ▾

Question

Inelastic collision is the-

Choices

Choice (4) Response
a.

Collision of ideal gas molecules with the walls of the container

b.

collision of electron and positron to an annihilate each other.

c.

collision of two rigid solid spheres lying on a frictionless table

d.

scattering of a-particles with the nucleus of gold atom

Question number: 931

» Laws of Motion » Laws of Friction

MCQ▾

Question

Block A weighs 6 N and block B weighs 4 N. The coefficient of kinetic friction is 0.25 for all surfaces. find the force F to slide B at a constant speed when A is held at rest.

Choices

Choice (4) Response
a.

4N

b.

1N

c.

2N

d.

3.5N

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