Electromagnetic Induction Test

Result

Electromagnetic Induction Test - 33

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Weekly Quiz Competition

Question 1
4 / -1

A conducting rod of length l is falling with a velocity v perpendicular to a uniform horizontal magnetic field B. The potential difference between its two ends will be

A

B

C

D
Question 2
4 / -1

A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be

A
In the plane of paper pointing towards right

B
In the plane of paper pointing towards left

C
Perpendicular to the plane of paper and downwards

D
Perpendicular to the plane of paper and upwards
Question 3
4 / -1

The current carrying wire and the rod AB are in the same plane. The rod moves parallel to the wire with a velocity v. Which one of the following statements is true about induced e.m.f. in the rod

A
End A will be at lower potential with respect to B

B
A and B will be at the same potential

C
There will be no induced e.m.f. in the rod

D
Potential at A will be higher than that at B
Question 4
4 / -1

A long horizontal metallic rod with length along the east-west direction is falling under gravity. The potential difference between its two ends will

A
Be zero

B
Be constant

C
Increase with time

D
Decrease with time

Solution
Question 5
4 / -1

Two similar circular loops carry equal currents in the same direction. On moving the coils further apart, the electric current will

A
Remain unaltered

B
Increases in one and decreases in the second

C
Increase in both

D
Decrease in both
Question 6
4 / -1

A metal rod moves at a constant velocity in a direction perpendicular to its length. A constant uniform magnetic field exists in space in a direction perpendicular to the rod as well as its velocity. Select the correct statement (s) from the following

A
The entire rod is at the same electric potential

B
There is an electric field in the rod

C
The electric potential is highest at the centre of the rod and decreases towards its ends

D
The electric potential is lowest at the centre of the rod and increases towards its ends

Solution
Question 7
4 / -1

A conducting wire is dropped along east-west direction, then

A
No e.m.f. is induced

B
No induced current flows

C
Induced current flows from west to east

D
Induced current flows from east to west
Question 8
4 / -1

The magnetic induction in the region between the pole faces of an electromagnet is 0.7 weber/m². The induced e.m.f. in a straight conductor 10 cm long, perpendicular to B and moving perpendicular both to magnetic induction and its own length with a velocity 2m/sec is

A
0.08 V

B
0.14 V

C
0.35 V

D
0.07 V

Solution
Question 9
4 / -1

A conducting rod of length l is moving in a transverse magnetic field of strength B with velocity v. The resistance of the rod is R. The current in the rod is

A

B

C
Zero

D
Question 10
4 / -1

A conducting square loop of side l and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane at the loop exists everywhere with half the loop outside the field, as shown in figure. The induced e.m.f. is

A
Zero

B
RvB

C
VBl / R

D
VBl