# Magnetic Effects of Current and Magnetism (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 79 - 83 of 155

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## Question number: 79

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

MCQ▾

### Question

An electron beam passes through a magnetic field of 2 x 10 -3 weber/m 2 and an electric field of 1.0 x 10 4 volt/m both acting simultaneously. If the electric field is removed, what will be the radius of the electron path?

### Choices

Choice (4) Response

a.

1.43 cm.

b.

0.43 cm

c.

3.43 cm.

d.

2.43 cm.

## Question number: 80

» Magnetic Effects of Current and Magnetism » Current Loop as Magnetic Dipole

MCQ▾

### Question

A circular coil has radius 4 cm and 20 number of turns carries a current of 3 ampere. It is placed in a magnetic field of intensity 0.5 weber/m 2. The magnetic dipole moment of the coil is, (take

### Choices

Choice (4) Response

a.

0.45 ampere m 2

b.

0.3 ampere m 2

c.

0.6 ampere m 2

d.

0.15 ampere m 2

## Question number: 81

» Magnetic Effects of Current and Magnetism » Magnetic Susceptibility and Permeability

MCQ▾

### Question

Dimensional formula of μ 0 is-

### Choices

Choice (4) Response

a.

MLT -2 A 2

b.

MLT -2 A -2

c.

MLT 2 A -2

d.

MLT 2 A 2

## Question number: 82

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

### Question

A solenoid of length 0.2m has 500 turns on it. If 8.71 x 10 -6 Weber/m 2 be the magnetic field at an end of the solenoid, then the current flowing in the solenoid is –

### Choices

Choice (4) Response

a.

A

b.

c.

d.

## Question number: 83

» Magnetic Effects of Current and Magnetism » Magnetic Susceptibility and Permeability

Assertion-Reason▾

### Assertion (Ꭺ)

The permeability of a ferromagnetic material dependent on the magnetic field.

### Reason (Ꭱ)

Permeability of a material is a constant quantity.

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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