NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1614 - 1617 of 2142

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Question number: 1614

» Oscillations and Waves » Simple Harmonic Motion » Energy

MCQ▾

Question

Three simple harmonic motions in the same direction having the same amplitude a and same period are superposed. If each differs in phase from the next by 45°, then -

(1) The resultant amplitude is Equation , and the phase of the resultant motion relative to the first is 90°

(2) The energy associated with the resulting motion is

(3) Times the energy associated with any single motion

(4) The resulting motion is not simple harmonic

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

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

2 and 4 are correct

Question number: 1615

» Electronic Devices » Semiconductors

MCQ▾

Question

Let N h and N e be the number of holes and conduction electrons respectively in a semiconductor. Then

Choices

Choice (4) Response

a.

N e > N h in an intrinsic semiconductor

b.

N h= N e in an extrinsic semiconductor

c.

N h= N e in an intrinsic semiconductor

d.

N h > N e in an intrinsic semiconductor

Question number: 1616

» Oscillations and Waves » Periodic Motion - Period Frequency

MCQ▾

Question

The displacement x (in meters) of a particle performing simple harmonic motion is related to time t (in seconds) as Equation . The frequency of the motion will,

Choices

Choice (4) Response

a.

1.0 Hz

b.

1.5 Hz

c.

0.5 Hz

d.

2.0 Hz

Question number: 1617

» Oscillations and Waves » Displacement as a Function of Time

MCQ▾

Question

The displacement of a particle executing S. H. M is given by Equation meters.

The maximum speed of the particle and amplitude of the motion is,

Choices

Choice (4) Response

a.

100 m/s and 1.30 m

b.

260 m/sec and 0.65 m

c.

250 m/s and 0.65 m

d.

200 cm/sec, and 0.65 m

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