# Magnetic Effects of Current and Magnetism (NEET Physics): Questions 101 - 104 of 155

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## Question number: 101

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

### Question

The mass of a specimen of a ferromagnetic material is 0.6 kg and its density is 7.8 x 10 3 kg/m 3. If the area of hysteresis loop of alternating magnetizing field of frequency 50Hz is 0.722 MKS units then the hysteresis loss per second will be

### Choices

Choice (4) Response

a.

27.77 x 10 -4 Joule

b.

277.7 x 10 -6 Joule

c.

277.7 x 10 -5 Joule

d.

277.7 x 10 -4 Joule

## Question number: 102

» Magnetic Effects of Current and Magnetism » Bar Magnet

Assertion-Reason▾

### Assertion (Ꭺ)

Gauss theorem is not applicable in magnetism.

### Reason (Ꭱ)

Mono magnetic pole does not exist.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

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

d.

Ꭺ is true but Ꭱ is false

## Question number: 103

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

MCQ▾

### Question

A rectangular coil of size 20 cm x 20 cm has 100 turns and carries a current of 1 A. It is placed in a uniform magnetic field B = 0.5 T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is

### Choices

Choice (4) Response

a.

200 Nm

b.

10 Nm

c.

Zero

d.

2 Nm

## Question number: 104

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

MCQ▾

### Question

The () graph for a current carrying coil placed in a uniform magnetic field is

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page