AIIMS Physics: Questions 379 - 383 of 500

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Question number: 379

» Rotational Motion » Torque

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Magnitude 21 Nm, direction along the negative z – axis

b.

Magnitude 31 Nm, direction along the positive z – axis

c.

Magnitude 21 Nm, direction along the positive z – axis

d.

Magnitude 31 Nm, direction along the negative z – axis

Question number: 380

» Kinematics » Motion in a Plane

MCQ▾

Question

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

Choices

Choice (4) Response

a.

89.8 m

b.

103.4 m

c.

72.5 m

d.

60.2 m

Question number: 381

» Electrostatics » Capacitors

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.

Decrease by 2 times

b.

Remain the same

c.

Decrease by 4 times

d.

Decrease by 6 times

Question number: 382

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

MCQ▾

Question

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

Choices

Choice (4) Response

a.

2 H

b.

0.5 H

c.

0.4 H

d.

1 H

Question number: 383

» Oscillations and Waves » Wave Motion

Appeared in Year: 1998

Assertion-Reason▾

Assertion (Ꭺ)

Sound waves cannot propagate through vacuum but light waves can.

Reason (Ꭱ)

Sound waves cannot be polarized but light waves can be.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

Ꭺ is false but Ꭱ is true

d.

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

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