Oscillations and Waves (NEET Physics): Questions 96 - 98 of 192

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Question number: 96

» Oscillations and Waves » Principle of Superposition of Waves

MCQ▾

Question

If two waves of same frequency and same amplitude on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by

Choices

Choice (4) Response

a.

Zero

b.

π2

c.

2π3

d.

π

Question number: 97

» Oscillations and Waves » Periodic Motion - Period Frequency

MCQ▾

Question

The time period of a simple pendulum of length 2 L as measured in an elevator descending with acceleration g / 3 is

Choices

Choice (4) Response

a.

6πLg

b.

2π3L2g

c.

π3Lg

d.

2π2L3g

Question number: 98

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

Question

Two blocks A and B each of mass m are connected by a massless spring of natural length L and spring constant k. The blocks are initially resting on a smooth horizontal floor with the spring at its natural length. A third identical block C also of mass m moves on the floor with a speed v along the line joining A and B and collides with A. Then

(1) The kinetic energy of the A - B system at maximum compression of the spring is mv24

(2) The maximum compression of the spring is Vm2k

(3) The kinetic energy of the A – B system at maximum compression of the spring is zero.

(4) The maximum compression of the spring is VmTk

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

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

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