A bar magnet is hung by a thin cotton th...

A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The energy required to rotate it by 60^(@) is W. Now the torrue required to keep the magnet in this new position is

`(W)/(sqrt3)`

`sqrt3 W`

`(sqrt3W)/(2)`

`(2W)/(sqrt3)`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

MAGNETISM AND MATTER
AAKASH INSTITUTE|Exercise ASSIGNMENT (SECTION D)|26 Videos
MAGNETISM AND MATTER
AAKASH INSTITUTE|Exercise ASSIGNMENT (SECTION B)|21 Videos
LAWS OF MOTION
AAKASH INSTITUTE|Exercise Assignment (SECTION-D) (Assertion-Reason Type Questions)|15 Videos
MECHANICAL PROPERTIES OF FLUIDS
AAKASH INSTITUTE|Exercise SECTION - J|9 Videos

Similar Questions

Explore conceptually related problems

A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in' equilibrium state. The energy required to rotute it by 60^(circ) is W . Now the torque required to keep the magnet in this new: position is sqrt(k) W . Find k .

A bar magnet hung by a insulating thread In a uniform horizontal magnetic field and magnet is in equilibrium Initially. The torque required to keep the magnet at angle by 30° with the direction of magnetic field is t. Then the work done to rotate it by same angle from initial position is

A bar magnet of magnetic moment M is hung by a thin cotton thread in a uniform magnetic field B. Work done by the external agent to rotate the bar magnet from stable equilibrium position to 120° with the direction of magnetic field is (consider change in angular speed is zero)

A magnetic needle lying parallel to a magnetic field requires W units of work to turn through 60^(@) . The external torque required to maintain the magnetic needle in this position is

A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60^(@) . The torque needed to maintain the needle in this position will be

AAKASH INSTITUTE-MAGNETISM AND MATTER -ASSIGNMENT (SECTION C)

A 250-turns recantagular coil of length 2.1 cm and width 1.25 cm ca...
Text Solution
|
If theta1 and theta2 be the apparent angles of dip observed in two ver...
Text Solution
|
A bar magnet is hung by a thin cotton thread in a uniform horizontal m...
Text Solution
|
The magnetic susceptibility is negative for
Text Solution
|
A compass needle which is allowed to move in a horizontal plane is tak...
Text Solution
|
A magnetic needle suspended parallel to a magnetic field requires sqrt...
Text Solution
|
There are four light-weight-rod sample A, B, C, D separately suspended...
Text Solution
|
A short bar magnet of magnetic moment 0*4JT^-1 is placed in a uniform ...
Text Solution
|
Electromagnets are made of soft iron because soft iron has
Text Solution
|
A vibration magnetometer placed in magnetic meridian has a small bar m...
Text Solution
|
A closely wound solenoid of 2000 turns and area of cross-section 1.5 x...
Text Solution
|
The magnetic moment of a diamagnetic atom is
Text Solution
|
A thin ring of radius R metre has charge q coulomb uniformly spread ...
Text Solution
|
A bar magnet having a magnetic moment of 2 xx 10 ^(4) JT ^(-1) is free...
Text Solution
|
If a diamagnetic substance is brought near the north or the south pole...
Text Solution
|
Curie temperature is the temperature above which
Text Solution
|
Nickel shows ferromagnetic property at room temperature. If the temper...
Text Solution
|
Above curie temperature
Text Solution
|
If the magnetic dipole of moment of an atom of diamagnetic material, p...
Text Solution
|
A bar magnet having a magnetic moment of 2xx10^(4) JT^(-1) is free to ...
Text Solution
|