Home
Class 12
PHYSICS
A square cardboard of side I and mass m ...

A square cardboard of side I and mass m is suspended from a horizontal axis XY as shown in figure. A single wire is wound along the periphery of board and carrying a clockwise current I. At t = 0, a vertical downward magnetic field of induction B is switched on. Find the minimum magnitude of B so that the board will be able to rotate up to horizontal level.

Promotional Banner

Similar Questions

Explore conceptually related problems

A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists a uniform magnetic field of magnitude B along one of the sides of cube. The magnitude of the force acting on the wire is

A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists a uniform magnetic field of magnitude B along one of the sides of cube. The magnitude of the force acting on the wire is

A wire of length L carries a current i along the x-axis. A magnetic field B=B_0(hati+hatj+hatk) exists in the space. Find the magnitude of the magnetic force acting on the wire.

Two insulated circular loop "A" and "B" of radius ' "a" ' carrying a current of ' "I" ' in the anti clockwise direction as shown in the figure.The magnitude of the magnetic induction at the centre will be

A wire of length l metre carries a current I ampere along the Y-axis. A magnetic field, vecB=B_0(hati+hatj+hatk) tesla exists in space. Find the magnitude of the force on the wire.

A wire of iength I carries a current along the x-axis. A magnetic field B=B_0(hatj+hatk) exists in the space. Find the magnitude of the magnetic force acting on the wire.

PQ is a uniform rod of length l and mass m carrying current i and is suspended in uniform magnetic field of induction vec(B) acting inward as shown in figure. The tension in each string is

A wire of length l carries a current I along the x-asis. A magnetic field exists which is given as vecB=B_0(veci+vecj+veck) T. find the magnitude of the magnetic force acting on the wire.