AIIMS (All India Institute of Medical Sciences) Physics: Questions 378 - 382 of 500

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Question number: 378

» Dual Nature of Matter and Radiation » Black-Body Radiation

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MCQ▾

Question

A black body, at a temperature of 240°C, radiates heat at a rate of . When its temperature is raised to 750°C, the heat radiated by it in will be closest to –

Choices

Choice (4)Response

a.

140

b.

480

c.

380

d.

260

Question number: 379

» Rotational Motion » Torque

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MCQ▾

Question

A force newton acts on a particle whose position vector with respect to origin O is Find the magnitude and direction of the torque.

Choices

Choice (4)Response

a.

Magnitude 21 Nm, direction along the positive z – axis

b.

Magnitude 31 Nm, direction along the negative z – axis

c.

Magnitude 21 Nm, direction along the negative z – axis

d.

Magnitude 31 Nm, direction along the positive z – axis

Question number: 380

» Kinematics » Motion in a Plane

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MCQ▾

Question

Fine the distance covered by a particle in 7 sec whose acceleration is . Assume that at .

Choices

Choice (4)Response

a.

103.4 m

b.

72.5 m

c.

89.8 m

d.

60.2 m

Question number: 381

» Electrostatics » Capacitors

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MCQ▾

Question

If the distance between the plats of a parallel plate capacitor is double and the dielectric is half, then its capacity will:

Choices

Choice (4)Response

a.

Remain the same

b.

Decrease by 4 times

c.

Decrease by 6 times

d.

Decrease by 2 times

Question number: 382

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

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MCQ▾

Question

The of mutual inductance of two coils when magnetic flux changes by and current changes by 0.08 A is –

Choices

Choice (4)Response

a.

0.4 H

b.

1 H

c.

0.5 H

d.

2 H

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