NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1594 - 1597 of 2184

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Question number: 1594

» Oscillations and Waves » Periodic Motion - Period Frequency

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MCQ▾

Question

The periodic time of a body executing simple harmonic motion is 3 sec. After how much time from time t = 0, its displacement will be half of its amplitude

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1595

» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring

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MCQ▾

Question

A spring having a spring constant k is loaded with a mass m. The spring is cut into two equal parts and one of these is loaded again with the same mass. The new spring constant is,

Choices

Choice (4) Response

a.

k

b.

c.

d.

Question number: 1596

» Electronic Devices » Semiconductor Diode

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MCQ▾

Question

The mobility of free electrons is more that the mobility of holes because,

Choices

Choice (4) Response

a.

They require less energy to continue their motion.

b.

They suffer less number of collisions

c.

They are of smaller size

d.

They carry negative charge

Question number: 1597

» Oscillations and Waves » Simple Harmonic Motion » Energy

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MCQ▾

Question

A particle constrained to move along the x-axis in a potential V = kx 2, is subjected to an external time dependent force f (t), here k is a constant, x is the distance from the origin and t is the time. At some time T, when the particle has zero velocity at x = 0, the external force is removed. Choose the incorrect options -

(1) Particle executes SHM

(2) Particle moves along + X direction

(3) Particle moves along - X direction

(4) Particle remains at rest

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

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

1,2 and 3 are correct