NEET Physics: Questions 575 - 581 of 2099

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Question number: 575

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

MCQ▾

Question

Which of the following is the most suitable for the core of electromagnets?

Choices

Choice (4) Response
a.

Air

b.

Steel

c.

Soft iron

d.

Copper-nickel alloy

Question number: 576

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

MCQ▾

Question

The magnetic moment of atomic neon is

Choices

Choice (4) Response
a.

Zero

b.

μB2

c.

3μB2

d.

μB

Question number: 577

» Magnetic Effects of Current and Magnetism » Bar Magnet

MCQ▾

Question

The period of oscillation of a freely suspended bar magnet is 4 second. If it is cut into two equal parts length wise then the time period of each part will be

Choices

Choice (4) Response
a.

0.5 sec

b.

0.25 sec

c.

4 sec

d.

2 sec

Passage

Read the passage given below and answer the questions that follow:

A conducting wire is bent into a loop as shown in the figure. The segment AOB is parabolic given by the equation y 2 = 2x while segment BA is a straight line parallel to the y-axis.

The magnetic field in the region is B and the current in the wire is 2A.

Electric current carrying loop segment AOB

Electric Current Carrying Loop Segment AOB

A conducting wire is bent into a loop as shown in figure. The segment AOB is parabolic and BA is straight line parallel to y-axis.

Question number: 578 (1 of 3 Based on Passage) Show Passage

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

Question

Magnetic field at point D due to segment AO of the loop is directed parallel to

Choices

Choice (4) Response
a.

k

b.

j

c.

i

d.

-k

Question number: 579 (2 of 3 Based on Passage) Show Passage

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

Question

The field created by the current in the loop at point C will be

Choices

Choice (4) Response
a.

μ02πk^

b.

μ02πk^

c.

μ04πk^

d. None of the above

Question number: 580 (3 of 3 Based on Passage) Show Passage

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

MCQ▾

Question

The torque on the loop will be

Choices

Choice (4) Response
a.

162Nm

b.

182Nm

c.

16 Nm

d.

Zero

Question number: 581

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

Question

The deflection in a moving coil galvanometer is

Choices

Choice (4) Response
a.

Inversely proportional to the area of the coil

b.

Directly proportional to the number of turns in the coil

c.

Directly proportional to the torsional constant

d.

Inversely proportional to the current flowing

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