AIIMS (All India Institute of Medical Sciences) Physics: Questions 15 - 18 of 500

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Question number: 15

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

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Appeared in Year: 2004

MCQ▾

Question

Liquid oxygen remains suspended between two pole faces of a magnet because it is [AIIMS]

Choices

Choice (4)Response

a.

Diamagnetic

b.

Antiferromagnetic

c.

Ferromagnetic

d.

Paramagnetic

Question number: 16

» Electromagnetic Induction & Alternating Currents » Eddy Currents

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Appeared in Year: 2006

MCQ▾

Question

A metallic ring is dropped down, keeping its plane perpendicular to a constant and horizontal magnetic field. The ring enters the region of magnetic field at t = 0 and completely emerges out at t = T sec. The current in the ring varies as – [AIIMS]

Choices

Choice (4)Response

a.

Current varies with time (Choice-A)

Current Varies with Time (Choice-A)

b.

Current varies with time (Choice-B)

Current Varies with Time (Choice-B)

c.

Current varies with time (Choice-C)

Current Varies with Time (Choice-C)

d.

Current varies with time (Choice-D)

Current Varies with Time (Choice-D)

Question number: 17

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

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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

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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.

c.

100 kV

d.

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