Home
Class 12
PHYSICS
Calculate the torque acting on a magnet ...

Calculate the torque acting on a magnet of length 20 cm and of pole strength `2 xx 10^(-5) Am` , placed in earth's magnetic field of flux density `2 xx 10^(-5) T ` , when (i) magnet is parallel to the field (ii) magnet is perpendicular to the field .

Text Solution

Verified by Experts

The correct Answer is:
(i) Zero , (ii) `0.8 xx 10^(-10)` Nm
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM

    SL ARORA|Exercise Based on (i) Earth s Magnetism (ii) magnetic field of a bar magnet|60 Videos

  • MAGNETISM

    SL ARORA|Exercise Based on Coulomb s law and dipole moment of a magnet|5 Videos

  • MAGNETIC EFFECTS OF CURRENT

    SL ARORA|Exercise TYPE C|4 Videos

  • OPTICAL INSTRUMENTS

    SL ARORA|Exercise Problems for self practice|35 Videos

Similar Questions

Explore conceptually related problems

Calculate torque acting on a bar magnet of length 20 cm magnetic dipole moment 4 xx 10^(-6) Am^(2) , which is placed in earth's magnetic field of flux density 2 xx 10^(-5) T , perpendicular to the field .

The couple acting on a magnet of length 10cm and pole strength 15A-m, kept in a field of B=2xx10^(-5) , at an anlge of 30^(@) is

If a magnet of length 10cm and pole strength 40 A-m is placed at an angle of 45^(@) in an uniform induction field of intensity 2xx10^(-4)T , the couple acting on it is

A magnet of length 0.1 m and pole strength 10^(-4) A.m. is kept in a magnetic field of 30 Wb//m^(2) at an angle 30^(@) . The couple acting on it is …xx10^(-4)Nm .

A magnet of length 10 cm and pole strength 4xx10^(-4)Am is placed in a manetic field of induction 2xx10^(-5)weber m^(-2) , such that the axis of the magnet makes an angel 30^(0) with the lines of induction. The moment of the couple acting on the magnet is

Calculate the work done in deflecting a small magnet of magnetic moment 10Am^(2) through 180^(@) from a uniform magnetic field of strength 0.4 xx 10^(-4)T .

A bar magnet of length 10cm and pole strength 2 Am makes an angle 60^(0) with a uniform magnetic field of induction 50T . The couple acting on it is