Moving Charges and Magnetism Test

Result

Moving Charges and Magnetism Test - 53

Score
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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

Same current i = 2A is flowing in a wire frame as shown in figure. The frame is a combination of two equilateral triangles ACD and CDE of side 1 m. It is placed in uniform magnetic field B = 4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is

A
24 N

B
Zero

C
16 N

D
8 N

Solution
Question 3
4 / -1

A uniform conducting wire ABC has a mass of 10 g. A current of 2 A flows through it. The wire is kept in a uniform magnetic field B = 2T. The acceleration of the wire will be

A
Zero

B
12 ms^–2 along y–axis

C
1.2 × 10^–3 ms^–2 along y–axis

D
0.6 × 10^–3 ms^–2 along y–axis

Solution
Question 4
4 / -1

In the given figure net magnetic field O will be

A

B

C

D

Solution
Question 5
4 / -1

In the following figure a wire bent in the form of a regular polygon of n sides is inscribed in a circle of radius a. Net magnetic field at centre will be

A

B

C

D

Solution
Question 6
4 / -1

A proton accelerated by a potential difference 500 KV moves though a transverse magnetic field of 0.51 T as shown in figure. The angle θ through which the proton deviates form the initial direction of its motion is

A
15°

B
30°

C
45°

D
60°

Solution
Question 7
4 / -1

AB and CD are long straight conductors, distance d apart, carrying a current I. The magnetic field at the midpoint of BC is

A

B

C

D

Solution
Question 8
4 / -1

The unit vectors i ̂,j ̂and k ̂are as shown below. What will be the magnetic field at Oin the following figure

A

B

C

D

Solution
Question 9
4 / -1

A

B

C

D
Question 10
4 / -1

A circular coil of 5 turns and of 10 cm mean diameter is connected to a voltage source. If the resistance of the coil is 10 Ω, the voltage of the source so as to nullify the horizontal component of earth\'s magnetic field of 30 A turn m^–1 at the centre of the coil should be

A
6 V, plane of the coil normal to magnetic meridian

B
2 V, plane of the coil normal to magnetic meridian

C
6 V, plane of the coil along the magnetic meridian

D
2 V, plane of the coil along the magnetic meridian

Solution