# Magnetic Effects of Current and Magnetism (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 54 - 57 of 155

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## Question number: 54

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

MCQ▾

### Question

A current of 2.0 amp is flowing through a wire of length 50 cm. If this wire be placed at an angle of 60° with the direction of a uniform magnetic field of 5.0 x 10 -4 N/Am the force on the wire will be,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 55

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

MCQ▾

### Question

The given figure represents a material which is

### Choices

Choice (4) Response

a.

Paramagnetic

b.

Diamagnetic

c.

None

d.

Ferromagnetic

## Question number: 56

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

MCQ▾

### Question

A solenoid of length 0.4 m and having 500 turns of wire carries a current of 3 A. A thin coil having 10 turns of wire and of radius 0.01 m carries a current of 0.4 A. The torque (in Nm) required to hold the coil in the middle of the solenoid with its axis perpendicular to the axis of the solenoid is (µ 0 = 4π x 10 -7 V-s/A-m)

### Choices

Choice (4) Response

a.

0.592 x 10 -4

b.

5.92 x 10 -6

c.

59.2 x 10 -6

d.

0.592 x 10 -6

## Question number: 57

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

### Question

Two long straight parallel wires carry currents I 1 and I 2 respectively, in the same direction (as shown). The distance between the wires is R. The magnetic field at the center of the two wires (At point P) will be-

(1) into the plane of paper (if I 1 > I 2)

(2) out of the plane of paper (if I 2 > I 1)

(3) out of the plane of paper (if I 2 > I 1)

(4) into the plane of paper (if I 1 > I 2)

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

### Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

1 and 2 are correct

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