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Mutual Induction

A circular lo...

Question

A circular loop is kept in that vertical plane which contains the north-south direction. It carries a current that is towards north at the topmost point. Let $A$ be a point on the axis of the circle to the east of it and $B$ be a point on this axis to the west of it. The magnetic field due to the loop:

A

is towards east at

A

and towards west at

B

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B

is towards west at

A

and towards east at

B

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C

is towards east at both

A

and

B

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D

is towards west at both

A

and

B

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Solution

The correct option is D is towards west at both $A$ and $B$
The situation is as shown in the figure.
Using the right hand thumb rule, the direction of magnetic field at both points A and B is towards west.

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Similar questions

Q. A circular loop is kept in that vertical plane which contains the north-south direction. It carries a current that is towards north at the topmost point. Let A be a point on the axis of the circle to the east of it and B a point on this axis to the west of it. The magnetic field due to the loop
(a) is towards east at A and towards west at B
(b) is towards west at A and towards east at B
(c) is towards east at both A and B
(d) is towards west at both A and B

A

is sailing towards north-east with velocity

\to v = 30^i + 50^j k m / h r

^i

points east and

^j

towards north. Ship

B

is at a distance of

80 k m

150 k m

A

and is sailing towards west at

10 k m / h r

. Time in which

A

will be at minimum distance from

B

A

is sailing towards north-east with velocity

\to v = 30^i + 50^j k m / h r

^i

points east and

^j

towards north. Ship

B

is at a distance of

80 k m

150 k m

A

and is sailing towards west at

10 k m / h r

. Time in which

A

will be at minimum distance from

B

A

is sailing towards north-east with velocity

\to v = 30^i + 50^j k m / h

^i

points east and

^j

points north. Ship

B

at a distance of

80 k m

150 k m

A

is sailing towards the west at

10 k m / h

A

will be at minimum distance from

B

A

is sailing towards north-east with velocity vector

\to v = 30^i + 50^j km/hr

^i

points east and

^j

B

is at a distance of

80 km

150 km

A

and is sailing towards west at

10 km/hr

A

will be at minimum distance from

B

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