Magnetic Effects of Current and Magnetism-Electric Charge Moving in Magnetic Field (NEET Physics): Questions 12 - 15 of 28

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Question number: 12

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

MCQ▾

Question

A particle of mass m and charge q moves with a constant velocity v along the positive x direction. It enters a region containing a uniform magnetic field B directed along the negative z direction, extending from x = a to x = b. The minimum value of v required so that the particle can just enter the region x < b is

Choices

Choice (4) Response

a.

q(ba)Bm

b.

qbBm

c.

qaBm

d.

q(b+a)B2m

Question number: 13

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

MCQ▾

Question

An α-particle is moving in a magnetic field of (3i^+2j^) tesla with a velocity of 5×105i^m/s . The magnetic force acting on the particle will be

Choices

Choice (4) Response

a.

3.2×1013N

b.

3.2×1013dyne

c.

3.2×1013N

d.

0

Question number: 14

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

MCQ▾

Question

If a particle moves in a circular path in clockwise direction after entering into a downward vertical magnetic field. The charge on the particle is-

Choices

Choice (4) Response

a.

Positive

b.

Nothing can be said

c.

neutral

d.

negative

Question number: 15

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

MCQ▾

Question

An α-particle travels at an angle of 30° to a magnetic field 0.8 T with a velocity of 10 5 m/s. The magnitude of force will be-

Choices

Choice (4) Response

a.

(1.28)4×104N

b.

1.28×1014N

c.

1.28×104

d.

(1.28)3×104N

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