Moving Charges and Magnetism Test

Result

Moving Charges and Magnetism Test - 10

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Weekly Quiz Competition

Question 1
4 / -1

The radius of curvature of the path of the charged particle in a uniform magnetic field is directly proportional to

A
the charge on the particle

B
the momentum of the particle

C
the energy of the particle

D
the intensity of the field.

Solution
Question 2
4 / -1

Four wire loops each of length 2.0 metres are bent into four loops P.Q.R and S and then suspended in a uniform magnetic field. Same current is passed in each loop. Which statement is correct ?

A
Couple on loop P will be the highest

B
Couple on loop Q will be the highest

C
Couple on loop R will be the highest

D
Couple on loop S will be the highest
Question 3
4 / -1

Cathode rays and canal rays produced in a certain discharge tube are deflected in the same direction, if

A
a magnetic field is applied normally

B
an electric field is applied normally

C
an electric field is applied tangentially

D
a magnetic field is applied tangentially.
Question 4
4 / -1

Magnetic field induction at the centre of the coil of 50 turns, radius 0.5 m and carrying a current of 2 A is

A
0.5 ×10^-5 T

B
1.25 × 10^-4 T

C
3 × 10^-5 T

D
4 × 10-5 T.

Solution
Question 5
4 / -1

A wire of length 2 m carries a current of 1 ampere is bend to form a circle. The magnetic moment of the coil is

A
2π

B
π/2

C
π/4

D
1/π
Question 6
4 / -1

The magnetic field of given length of wire for single turn coil at its centre is B, then its value for two turns coil for the same wire is

A

B

C
4B

D
2B

Solution
Question 7
4 / -1

A long solenoid has n turns per metre and current I ampere is flowing through it. The magnetic field at the ends of solenoid is

A
μ₀nI/2

B
μ₀nI

C
zero

D
2μ₀nI

Solution
Question 8
4 / -1

A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of magnetic field is

A
B/2

B
B

C
2B

D
4B

Solution
Question 9
4 / -1

Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the Fig. The regions which contain some points of zero magnetic induction are

A
I and II

B
I and III

C
I and IV

D
II and III
Question 10
4 / -1

A
v > u, y < 0

B
v = u , y > 0

C
v > u, y > 0

D
v = u, y < 0

Solution