AIIMS (All India Institute of Medical Sciences) Physics: Questions 19 - 22 of 500

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Question number: 19

» Rotational Motion » Concepts of Rotational Motion

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Appeared in Year: 2005

MCQ▾

Question

A horizontal platform is rotating with uniform angular velocity around the vertical axis passing through its center. At some instant of time a viscous fluid of mass “m” is dropped at the center and is allowed to spread out and finally fall on ground. The angular velocity during this period: - [AIIMS]

Choices

Choice (4)Response

a.

Remains unaltered

b.

Decreases initially and increases again

c.

Decreases continuously

d.

Increases continuously

Question number: 20

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

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Appeared in Year: 2004

MCQ▾

Question

Two parallel beams of positrons moving in the same direction will – [AIIMS]

Choices

Choice (4)Response

a.

Repel to each other

b.

Attracts to each other

c.

Be deflected normal to the plane containing the two beams

d.

Will not interact with each other

Question number: 21

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

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Appeared in Year: 2001

MCQ▾

Question

The coil of choke in a circuit: [AIIMS]

Choices

Choice (4)Response

a.

Decrease the current

b.

Increases the current

c.

Has high resistance to d c circuit

d.

Does not change the current

Question number: 22

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

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Appeared in Year: 2000

MCQ▾

Question

If the rotational velocity of a dynamo armature is doubled, then induced emf will become – [AIIMS]

Choices

Choice (4)Response

a.

Unchanged

b.

Two times

c.

Four times

d.

Half

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