# Magnetic Effects of Current and Magnetism-Current Loop as Magnetic Dipole [NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 6 - 9 of 28

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## Question number: 6

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

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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.

0.01 Nm

b.

0.8 Nm

c.

Zero

d.

0.001 Nm

## Question number: 7

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

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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.

1 and 2 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1,2 and 3 are correct

## Question number: 8

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

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MCQ▾

### Question

Current i is carried in a wire of length L. If the wire is turned into a circular coil, the maximum magnitude of torque in a given magnetic field B will be,

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 9

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

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MCQ▾

### Question

A circular coil has radius 4 cm and 20 number of turns carries a current of 3 ampere. It is placed in a magnetic field of intensity 0.5 weber/m 2. The magnetic dipole moment of the coil is, (take

### Choices

Choice (4)Response

a.

0.15 ampere m 2

b.

0.45 ampere m 2

c.

0.3 ampere m 2

d.

0.6 ampere m 2

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