NEET Physics: Questions 1611 - 1614 of 2098

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Question number: 1611

» Oscillations and Waves » Resonance

MCQ▾

Question

A particle with restoring force proportional to displacement and resisting force proportional to velocity is subjected to a force F sin ωt. If the amplitude of the particle is maximum for ω = ω 1 and the energy of the particle is maximum for ω = ω 2, then (where ω 0 natural frequency of oscillation of particle)

Choices

Choice (4) Response

a.

ω1ω0andω2ω0

b.

ω1=ω0andω2=ω0

c.

ω1=ω0andω2ω0

d.

ω1ω0andω2=ω0

Question number: 1612

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

A particle executes simple harmonic motion with an angular velocity and maximum acceleration of 3.5 rad/sec and 7.5 m/s 2 respectively. The amplitude of oscillation is

Choices

Choice (4) Response

a.

0.61 m

b.

0.36 m

c.

0.28 m

d.

0.53 m

Question number: 1613

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

The approximate ratio of resistances in the forward and reverse bias of the PN-junction diode is

Choices

Choice (4) Response

a.

102:1

b.

102:1

c.

1:104

d.

1:104

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 (1+2)a , 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

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