Magnetic Effects of Current and Magnetism (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 58 - 61 of 155

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Question number: 58

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

MCQ▾

Question

The magnetic moment of a current carrying circular coil is

Choices

Choice (4) Response

a.

Directly proportional to the square of the length of the wire

b.

Directly proportional to the length of the wire

c.

Inversely proportional to the length of the wire

d.

Inversely proportional to the square of the length of the wire

Question number: 59

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

MCQ▾

Question

A particle of mass m and charge q moves with a constant velocity v along the positive x direction. It enters a region containing a uniform magnetic field B directed along the negative z direction, extending from x = a to x = b. The minimum value of v required so that the particle can just enter the region x < b is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 60

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

MCQ▾

Question

A circular loop of area 0.01m 2 carrying a current of 10 A, is held perpendicular to a magnetic field of intensity 0.1 T. The torque acting on the loop is

Choices

Choice (4) Response

a.

Zero

b.

0.8 Nm

c.

0.01 Nm

d.

0.001 Nm

Question number: 61

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

MCQ▾

Question

Four wires each of length 2.0 meter are bent into four loops P, Q, R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statements are incorrect?

(1) Couple on loop P will be the highest

(2) Couple on loop Q will be the highest

(3) Couple on loop R will be the highest

(4) Couple on loop S will be the highest

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1, 2 and 3 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

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