NEET Physics: Questions 643 - 646 of 2099

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2099 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 643

» 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: 644

» 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: 645

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

MCQ▾

Question

The ( τθ ) 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.

Question number: 646

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

A moving coil galvanometer has N number of turns in a coil of effective area A. It carries a current I. The magnetic field B is radial. The torque acting on the coil is

Choices

Choice (4) Response
a.

N 2ABi

b.

NABi 2

c.

NA 2B 2i

d.

NABi

Sign In