Home
Class 12
PHYSICS
The force between two short bar magnet...

The force between two short bar magnets with magnetic moments `M_(1)` and `M_(2)` whose centres are r metre apart is 8.0 N. if the seperation is increased to 2r, then force between then is reduced to

A

4.0 n

B

2.0 n

C

1.0 n

D

0.5 n

Text Solution

Verified by Experts

The correct Answer is:
D
`F=(mu_(0))/(4pi).(6M_(1)M_(2))/(r^(4))`
`therefore F=(F)/(16)=8/16=0.5 N`
Promotional Banner

Topper's Solved these Questions

  • MAGNETOSTATICS

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTION (LEVEL I) (ASSERTION AND REASONING)|2 Videos

  • MAGNETOSTATICS

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTION (LEVEL I) (PARAGRAPH QUESTIONS )|1 Videos

  • LAWS OF MOTION

    MODERN PUBLICATION|Exercise Revision test|43 Videos

  • MOCK TEST-1

    MODERN PUBLICATION|Exercise MCQs|47 Videos

Similar Questions

Explore conceptually related problems

Derive the formula to find the angle between two lines with slopes m_(1) and m_(2)

The electrostatic force on a metal sphere of charge 0.4muC due to another identical metal sphere of charge -0.8muC in air is 0.2N. Find the distance between the two spheres and also the force between the same two spheres when they are brought into contact and then replaced in their initial positions.