AIIMS Physics: Questions 331 - 335 of 500

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Question number: 331

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 1997

MCQ▾

Question

A coil of copper having 900 turns is placed in a magnetic field Equation perpendicular to its plane. The cross sectional area of the coil is 0.5 m2. If it turns through 180° in 0.02 sec, then the induced emf in the coil is –

Choices

Choice (4) Response

a.

135 V

b.

35 V

c.

0.4 V

d.

0.2 V

Question number: 332

» Oscillations and Waves » Speed of a Wave

MCQ▾

Question

The tension in a piano wire is 20N. What should be the tension in the wire to produce a note of three times of the frequency?

Choices

Choice (4) Response

a.

110N

b.

120N

c.

180N

d.

140N

Question number: 333

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2002

Assertion-Reason▾

Assertion (Ꭺ)

The flash of lighting is seen before the sound of thunder is heard.

Reason (Ꭱ)

Speed of sound is greater than speed of light.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 334

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

A force of Equation newton acts on a body and displaces it by Equation meter. The work done by the force is:

Choices

Choice (4) Response

a.

49 J

b.

120 J

c.

72 J

d.

56 J

Question number: 335

» Oscillations and Waves » Harmonics

MCQ▾

Question

Two sounds in a gas differ in their loudness level by 40 db. What is the ratio of the amplitude of the pressure oscillations?

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation Equation

d.

Equation

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