Magnetic Effects of Current and Magnetism (AIIMS Physics): Questions 36 - 41 of 49

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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 0.4×105Wbm2 . 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

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 0.44×104T is along the plane of the coil. The magnetic field of coil:

Choices

Choice (4) Response
a.

7.62×104T

b.

7.62×104T

c.

7.62×104T

d.

7.62×105T

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

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

Question number: 40

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

MCQ▾

Question

Which of the following cannot be deflected by magnetic field?

Choices

Choice (4) Response
a.

Cosmicrays

b.

γrays

c.

βrays

d.

αrays

Question number: 41

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

MCQ▾

Question

A charge with 2×1011C and 4×107kg mass moving with a velocity of 0.5×108ms along x axis. A uniform static magnetic field of 0.7T is acting along the y – axis. The magnetic force (magnitude and direction) on charge –

Choices

Choice (4) Response
a.

7×104N,alongxaxis

b.

7×104N,alongyaxis

c.

7×104N,alongzaxis

d.

Zero

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