Moving Charges and Magnetism Test

Result

Moving Charges and Magnetism Test - 46

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Weekly Quiz Competition

Question 1
4 / -1

In hydrogen atom, the electron is making 6.6 × 10¹⁵ rev/sec around the nucleus in an orbit of radius 0.528 Å. The magnetic moment (A – m²) will be

A
1 × 10^–15

B
1 × 10^–10

C
1 × 10^–23

D
1 × 10^–27

Solution
Question 2
4 / -1

A triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of the loop is in the direction of B. The torque on the loop is

A
Zero

B

C

D

Solution
Question 3
4 / -1

Three long, straight and parallel wires carrying current are arranged as shown in the figure. The wire C which carries a current of 5.0 amp is so placed that it experiences no force. The distance of wire C from wire D is then

A
9 cm

B
7 cm

C
5 cm

D
3 cm

Solution
Question 4
4 / -1

A vertical wire carrying a current in the upward direction is placed in horizontal magnetic field directed towards north. The wire will experience a force directed towards

A
North

B
South

C
East

D
West
Question 5
4 / -1

A coil carrying electric current is placed in uniform magnetic field, then

A
Torque is formed

B
E.M.F. is induced

C
Both (a) and (b) are correct

D
None of the above
Question 6
4 / -1

A circular loop carrying a current is replaced by an equivalent magnetic dipole. A point on the axis of the loop is

A
An end-on position

B
A broad side-on position

C
Both (a) and (b)

D
Neither (a) nor (b)
Question 7
4 / -1

A power line lies along the East–West direction and carries a current of 10 ampere. The force per metre due to the earth\'s magnetic field of 10^–4 tesla is

A
10^–5 N

B
10^–4 N

C
10^–3 N

D
10^–2 N

Solution
Question 8
4 / -1

In ballistic galvanometer, the frame on which the coil is wound is non-metallic to

A
Avoid the production of induced e.m.f.

B
Avoid the production of eddy currents

C
Increase the production of eddy currents

D
Increase the production of induced e.m.f.
Question 9
4 / -1

Two parallel beams of electrons moving in the same direction produce a mutual force

A
Of attraction in plane of paper

B
Of repulsion in plane of paper

C
Upwards perpendicular to plane of paper

D
Downwards perpendicular to plane of paper
Question 10
4 / -1

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

A

B

C

D

Solution