Magnetic Effects of Current and Magnetism (NEET (National Eligibility cum Medical Entrance Test) 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 ( Equation ) graph for a current carrying coil placed in a uniform magnetic field is

Choices

Choice (4) Response

a.

Graph of torque τ→θ (option A)

Graph of Torque Τ→Θ (Option A)

Figure shows the graph of torque τ→θ. It is not liner.

b.

Graph of torque τ→θ (option B)

Graph of Torque Τ→Θ (Option B)

Figure shows the graph of torque τ→θ. It is not liner.

c.

Graph of torque τ→θ (option C)

Graph of Torque Τ→Θ (Option C)

Figure shows the graph of torque τ→θ. It is liner.

d.

Graph of torque τ→θ (option D)

Graph of Torque Τ→Θ (Option D)

Figure shows the graph of torque τ→θ. It is not liner.

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