Home
Class 11
PHYSICS
When a bar magnet is placed at 90^(@) to...

When a bar magnet is placed at `90^(@)` to a uniform magnetic field, it is acted upon by a couple which is maximum. For the couple to be half of the maximum value, at what angle should the magnet be inclined to the magnetic field `(B)`?

A

`45^(@)`

B

`30^(@)`

C

`60^(@)`

D

`75^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`tau=MB sin theta` for `theta=90^(@), tau` is maximum
Thus, `tau_(1)=MB and tau_(2) =MB sin theta`
`:. tau_(1)/tau_(1) =1/2 =(MB sin theta)/(MB)=sin theta`
`:. sin theta=1/2 :. theta=30^(@)`
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|10 Videos

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|10 Videos

  • MEASUREMENTS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|10 Videos

Similar Questions

Explore conceptually related problems

When a bar magnet is placed at 90^(@) to a uniform magnetic firld, it is acted upon by a couple which is maxium. For the couple to be half of the maximum. For the couple to be half of the maxiumum vlaue, at what angle should the magnet be inclined to the magnetic fiels (B) ?

When a bar magnet is placed in a non-uniform magnetic field, it performs

A bar magnet is placed inside a uniform magnetic field, What does in experience?

The magnetic field is maximum at

The restoring couple for a magnet oscillating in the uniform magnetic field is provided by

A bar magnet of moment bar(M) is in a magnetic field of induction bar(B) . Then the couple is

When an electric dipole is placed in a uniform electric field, a couple acts on it. The moment of couple will be maximum when the dipole is placed

The maximum value of emf indued in a coil rotating in a uniform magnetic field is called as