# Magnetic Effects of Current and Magnetism-Electric Charge Moving in Magnetic Field (NEET Physics): Questions 4 - 7 of 29

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## Question number: 4

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

MCQ▾

### Question

If an electron is moving with velocity v in an orbit of radius r in a hydrogen atom, then the equivalent magnetic moment is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 5

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

MCQ▾

### Question

What is the net force on the square coil?

### Choices

Choice (4) Response

a.

25 x 10 -7 N towards wire

b.

25 x 10 -7 N away from wire

c.

35 x 10 -7 N towards wire

d.

35 x 10 -7 N away from wire

## Question number: 6

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

MCQ▾

### Question

proton of energy 8eV is moving in a circular path in a uniform magnetic field. The energy of an α-particle moving in the same magnetic field and along the same path will be-

### Choices

Choice (4) Response

a.

6eV

b.

2eV

c.

4eV

d.

8eV

## Question number: 7

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

MCQ▾

### Question

A beam of protons enters a uniform magnetic field of 0.3 tesla with a velocity of 4 x 10 5 m/s at an angle of 60° to the field. Then, (Mass of the proton = 1.7 x 10 -27 kg. )

(1) The radius of the helical path is 1.226 x 10 -2 m

(2) The pitch of the helix is 4.45 x 10 -2 m

(3) The radius of the helical path is 1.226 x 10 -3 m

(4) The pitch of the helix is 4.45 x 10 -4 m

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

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