Magnetic Effects of Current and Magnetism (AIIMS (All India Institute of Medical Sciences) Physics): Questions 35 - 39 of 49

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Question number: 35

» Magnetic Effects of Current and Magnetism » Magnet Oscillations

MCQ▾

Question

A magnet makes 30 oscillations per minute at a place having magnetic field of. At another place, it takes 1.5 sec to complete one vibration. The value of earth’s horizontal field at that place is:

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 36

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

MCQ▾

Question

The earth’s magnetic field at a given point is. This field is to be annulled by magnetic induction at the center of a circular conducting loop of radius 8.0 cm. The current required to be flown in the loop is nearly:

Choices

Choice (4) Response

a.

50 A

b.

0.5 A

c.

0.25 A

d.

5 A

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Question number: 37

» Magnetic Effects of Current and Magnetism » Earth's Magnetic Field

MCQ▾

Question

The magnetic needle of a tangent galvanometer is deflected at an angle 60°. The horizontal component of earth’s magnetic field is along the plane of the coil. The magnetic field of coil:

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 38

» Magnetic Effects of Current and Magnetism » Cyclotron

MCQ▾

Question

The cyclotron frequency of an electron gyrating in a magnetic field of 5 T is approximately –

Choices

Choice (4) Response

a.

280 GHz

b.

140 GHz

c.

28 Hz

d.

160 MHz

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Question number: 39

» Magnetic Effects of Current and Magnetism » Cyclotron

MCQ▾

Question

The cyclotron frequency of an electron gyrating in a magnetic field of 2 T is approximately –

Choices

Choice (4) Response

a.

560 MHz

b.

56 GHz

c.

56 Hz

d.

5.6 GHz

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