Home
Class 12
PHYSICS
Two like mangetic poles of strength 10 a...

Two like mangetic poles of strength 10 and 40 SI units are separated by a distance 30cm. The intensity of magnetic field is zero on the line joining them

A

At a point 10cm from the stronger pole

B

At a point 20cm from the stronger pole

C

At the mid point

D

At infinity

Text Solution

Verified by Experts

The correct Answer is:
B
Suppose magnetic field is zero at point P which lies at a distance x from 10 units pole.

Hence, at P `(mu_(0))/(4pi).(10)/(x^(2))=(mu_(0))/(4pi).(40)/(30-x)^(2) Rightarrow =10cm`
Promotional Banner

Similar Questions

Explore conceptually related problems

Two like magnetic poles of strenth 10 and 40 SI units are separated by a distance 30 cm. The intensity of magnetic field is zero on the line joining them

There are two bodies of masses 100 kg and 1000 kg separated by a distance 1m . The intensity of gravitational field at the mid point of the line joining them will be

Two bodies of masses 50 kg and 100 kg are at a distance 1m apart. The intensity of gravitational field at the mid-point of the line joining them is (in joules)

Two spheres A and B are charged with the charges of +10 and +20 coulomb respectively and separated by a distance of 80 cm. The electric field at point on the line joining the centres of the two spheres will be zero at a distance from the sphere A :

Two charges Q_1 and Q_2 are separated by distance r. Under what conditions will the electric field be zero on the line joining them (i) between the charges (ii) outside the charge?

A north pole of strength 50 Am and south pole of strength 100 Am are separated by a distance of 10 cm in air. Find the force between them.

Two magnetic poles of pole strength 324 milli amp.m. and 400 milli amp m are kept at a distance of 10cm in air. The null point will be at a distance of …… cm, on the line joining the two poles, from the weak pole if they are like poles.

Two point charges of 5 mu C and 20 mu C are separated by a distance of 2m. Find the point on the line joining them at which electric field intensity is zero.

Two particles of masses 'm' and '9m' are separated by a distance 'r'. At a point on the line joining them the gravitational field is zero. The gravitational potential at that point is (G = Universal constant of gravitation)