Magnetic Effects of Current and Magnetism-Electric Charge Moving in Magnetic Field (NEET Physics): Questions 21 - 25 of 28

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Question number: 21

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

MCQ▾

Question

A beam of protons is moving horizontally towards you. As it approaches, it passes through a magnetic field directed downward. The beam deflects-

 Finding magnetic field direction in a matrix

Finding Magnetic Field Direction in a Matrix

In figure cross indicate that the magnetic field directed downward, and the deflection of proton beam also shown in figure.

Choices

Choice (4) Response

a.

Nothing can be said

b.

To your left side

c.

Does not deflect

d.

To your right side

Question number: 22

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

MCQ▾

Question

A straight horizontal copper wire carries a current i = 30 A. The linear mass density of the wire is 45 g/m. What is the magnitude of the magnetic field needed to balance its weight?

Choices

Choice (4) Response

a.

0 Gauss

b.

147 Gauss

c.

441 Gauss

d.

14.7 Gauss

Question number: 23

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

MCQ▾

Question

A particle having charge q, mass m and kinetic energy E, enters a magnetic field B normally. It will oscillated with frequency equal to,

Choices

Choice (4) Response

a.

qB2πm

b.

mB2πq

c.

qE2πm

d.

qE2πB

Question number: 24

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

MCQ▾

Question

A proton, a deuteron and an α-particle are accelerated through same potential difference and then they enter a normal uniform magnetic field. The ratio of their kinetic energies will be-

Choices

Choice (4) Response

a.

1: 2: 4

b.

1: 1: 2

c.

2: 1: 3

d.

1: 1: 1

Passage

Read the passage given below and answer the questions that follows:

A charge particles q enters in a magnetic field B=yi^+xj^ with the velocity v=xi^+yj^ . Neglect any force other than magnetic force. Now answer the following question.

Question number: 25 (1 of 2 Based on Passage) Show Passage

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

MCQ▾

Question

Which of the following is true for the direction of magnetic force?

Choices

Choice (4) Response

a.

If x > y then force works along (-z) direction

b.

If x < y then force works along (+z) direction

c.

If x > y then force works along (+z) direction

d.

None

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