Default Title

Question (1)

QN0039213

A straight conductor of length moves at a speed of . When the conductor makes an angle
of with the direction of magnetic field of induction of then induced emf

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Link:

Report Error

Question (2)

QN0039214

A wire of length is perpendicular to plane. It is moved with velocity
through a region of uniform induction . The potential difference between the ends of the wire is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

(as length of conductor is

Link:

Report Error

Question (3)

QN0039215

A 10 -meter wire is kept in east-west direction. It is falling down with a speed of 5.0 meter/second,
perpendicular to the horizontal component of earth's magnetic field of weber/meter .
The momentary potential difference induced between the ends of the wire will be

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

If a wire, meter in length, moves perpendicular to a magnetic field of weber/meter with a velocity of meter/ second, then the e.m.f. induced in the wire is given by v volt.

Here, weber/meter , and meter.

volt.

Link:

Report Error

Question (4)

QN0039216

A conducting square loop of side '  ' and resistance '  ' moves in its plane with the uniform
velocity '  'perpendicular to one of its sides. A magnetic induction '  ' constant in time and space
pointing perpendicular and into the plane of the loop exists everywhere as shown in the figure.
The current induced in the loop is

(A)
BLv/R Clockwise
(B)
BLv/R Anticlockwise
(C)
Anticlockwise
(D)
Zero

Correct Answer: D

Explanation:

Current induced is

Now

But there is no change of flux with time, as all remain constant with time.

No current is induced.

Link:

Report Error

Question (5)

QN0039217

A metallic conductor of length rotates in a vertical plane parallel to east-west direction about
one of its end with angular velocity . If the horizontal component of earth's magnetic field
is , then emf induced between the two ends of the conductor is :

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

emf induced between the two ends is given by

Link:

Report Error

Question (6)

QN0039218

A sliding wire of length  and having a resistance of  moves along conducting guiding
rails  and   with a uniform speed of . A magnetic field of  exists normal to the plane
of  directed into the page. The guides are short -circuited with resistances of 4 and 2  as shown.
The current through the sliding wire is :

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

Link:

Report Error

Question (7)

QN0039219

A wire of length moves with a velocity of , perpendicular to a magnetic field.
If the e.m.f. induced in the wire is , the magnitude of the field in tesla is

(A)
2
(B)
5
(C)
0.8
(D)
2.5

Correct Answer: C

Explanation:

The magnitude of induced e.m.f. is given by

tesla

Link:

Report Error

Question (8)

QN0039220

The figure shows a wire sliding on two parallel conducting rails placed at a separation . A magnetic
field exists in a direction perpendicular to the plane of the rails. The force required to keep the
wire moving at a constant velocity will be

(A)
(B)
(C)
(D)
zero

Correct Answer: D

Explanation:

No change in flux, hence no force required.

Link:

Report Error

Question (9)

QN0039221

A metallic square loop is moving in its own plane with velocity in a unifrom magnetic field
perpendicular to its plane as shown in figure. An electric field is induced

(A)
in , but not in
(B)
in , but not in
(C)
neither in nor in
(D)
in both and

Correct Answer: C

Explanation:

The electric field/emf is induced neither in sides and nor in . Unless the metallic square loop is entering or leaving the magnetic field and the flux linked with it is changing.

Link:

Report Error

Question (10)

QN0039222

A conductor of length is moving with a speed of perpendicular to a magnetic field of
intensity . The induced e.m.f. across the conductor is

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

Length of conductor Speed and magnetic field . Induced e.m.f.

.

Link:

Report Error

Question (1)

A straight conductor of length moves at a speed of . When the conductor makes an angle of with the direction of magnetic field of induction of then induced emf

Explanation:

Link:

Question (2)

A wire of length is perpendicular to plane. It is moved with velocity through a region of uniform induction . The potential difference between the ends of the wire is

Explanation:

Link:

Question (3)

A 10 -meter wire is kept in east-west direction. It is falling down with a speed of 5.0 meter/second, perpendicular to the horizontal component of earth's magnetic field of weber/meter . The momentary potential difference induced between the ends of the wire will be

Explanation:

Link:

Question (4)

Explanation:

Link:

Question (5)

A metallic conductor of length rotates in a vertical plane parallel to east-west direction about one of its end with angular velocity . If the horizontal component of earth's magnetic field is , then emf induced between the two ends of the conductor is :

Explanation:

Link:

Question (6)

Explanation:

Link:

Question (7)

A wire of length moves with a velocity of , perpendicular to a magnetic field. If the e.m.f. induced in the wire is , the magnitude of the field in tesla is

Explanation:

Link:

Question (8)

The figure shows a wire sliding on two parallel conducting rails placed at a separation . A magnetic field exists in a direction perpendicular to the plane of the rails. The force required to keep the wire moving at a constant velocity will be

Explanation:

Link:

Question (9)

A metallic square loop is moving in its own plane with velocity in a unifrom magnetic field perpendicular to its plane as shown in figure. An electric field is induced

Explanation:

Link:

Question (10)

A conductor of length is moving with a speed of perpendicular to a magnetic field of intensity . The induced e.m.f. across the conductor is

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY

A straight conductor of length moves at a speed of . When the conductor makes an angle
of with the direction of magnetic field of induction of then induced emf

A wire of length is perpendicular to plane. It is moved with velocity
through a region of uniform induction . The potential difference between the ends of the wire is

A 10 -meter wire is kept in east-west direction. It is falling down with a speed of 5.0 meter/second,
perpendicular to the horizontal component of earth's magnetic field of weber/meter .
The momentary potential difference induced between the ends of the wire will be

A metallic conductor of length rotates in a vertical plane parallel to east-west direction about
one of its end with angular velocity . If the horizontal component of earth's magnetic field
is , then emf induced between the two ends of the conductor is :

A wire of length moves with a velocity of , perpendicular to a magnetic field.
If the e.m.f. induced in the wire is , the magnitude of the field in tesla is

The figure shows a wire sliding on two parallel conducting rails placed at a separation . A magnetic
field exists in a direction perpendicular to the plane of the rails. The force required to keep the
wire moving at a constant velocity will be

A metallic square loop is moving in its own plane with velocity in a unifrom magnetic field
perpendicular to its plane as shown in figure. An electric field is induced

A conductor of length is moving with a speed of perpendicular to a magnetic field of
intensity . The induced e.m.f. across the conductor is