Home
Class 12
PHYSICS
The distance between the poles of a hors...

The distance between the poles of a horse shoe magnet is 0.1 m and its pole strength is 0.01 amp-m. The induction of magnetic field at a point midway between the poles will be

A

`2xx10^(-5)`T

B

`4xx10^(-6)`T

C

`8xx10^(-7)`T

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
3
Net magnetic field at mid point `P, B=B_(N) +B_(S)`
where `B_(N)`=magnetic field due to N- pole
`B_(S) `= magnetic field due to S- pol e `B_(N)=B_(S)=mu_(0)/4pi m/r^(2)=10^(7)xx0.01/(0.1/2)^(2)=4xx10^(-7)`T
`:.B_(net)=8xx10^(-7)`T
Promotional Banner

Similar Questions

Explore conceptually related problems

The distance between two poles of magnets is called as

A bar magnet is 0.10 m long and its pole strength is 120 Am . Find magnitude of magnetic field at a point on its axis at a distance 20 cm from it .

The pole strength of a horse shoe magnet is 90Am and distance between the poles is 6 cm . The magnetic induction at mid point of the line joining the poles is,

A bar magnet is 0.1 m long and its pole strength is 12 Am. Find the magnetic induction at a point on its axis at a distance of 0.2 m from its centre.

When a small piece of wire passes between the magnetic poles of a horse-shoe magnet in 0.1 sec, emf of 4 xx 10^(–3) volt is induced in it. The magnetic flux between the poles is :

The effective length of magnet is 31.4cm and its pole strength is 0.8Am. The magnetic moment, if it is bent in the form of a semicircle is… A-m^(2) .

The magnetic moment of a magnet is 3.6xx10^(-3)A.m^(2) . Its pole strength is 120 mili amp.M . Its magnetic length is

The magnetic moment of bar magnet of length ' "2l and pole strength 'm' is