AIIMS (All India Institute of Medical Sciences) Physics: Questions 17 - 20 of 500

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Question number: 17

» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field

Appeared in Year: 1999

MCQ▾

Question

Two identically charged particles A and B initially at rest are accelerated by a common potential difference V. They enter into a uniform transverse magnetic field B and describe a circular path of radii r1, and r2 respectively then their mass ratio is: [AIPMT]

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 18

» X - Rays » Soft and Hard X - Ray

Appeared in Year: 2006

MCQ▾

Question

Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10-11 m. The accelerating voltage for electrons in X-rays machine should be – [AIIMS]

Choices

Choice (4) Response

a.

b.

100 kV

c.

d.

Question number: 19

» Rotational Motion » Concepts of Rotational Motion

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.

Decreases initially and increases again

b.

Decreases continuously

c.

Remains unaltered

d.

Increases continuously

Question number: 20

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

Appeared in Year: 2004

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Will not interact with each other

b.

Attracts to each other

c.

Be deflected normal to the plane containing the two beams

d.

Repel to each other

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