Home
Class 12
PHYSICS
A metal ring kept (supported by a card b...

A metal ring kept (supported by a card borad) on the top of a fixed soleniod carry a current I as shown in figure. The center of the ring coincides with the axis of the solenoid. If the current in the soleniod is switched off, then

Text Solution

Verified by Experts

The correct Answer is:
b
When the current in the solenoid swith off, magnetic flux linked with the solenoidl and hence with metal ring decreases. Current induced in the metal ring is clockwise, i.e., in the same direction as the solenoid current. So, they will attract each other. therefore, the metal ring will remain onthe carboard.
Promotional Banner

Similar Questions

Explore conceptually related problems

A square loop OABCO of side of side l carries a current i . It is placed as shown in figure. Find the magnetic moment of loop.

The diagram shows a solenoid carrying time varying current I=I_0t ( I_0 is constant) on the axis of this solenoid a conducting ring is being placed as shown in the figure. The mutual inductance of the ring and the solenoid is M and self inductance of the ring is L . if the resistance of the ring is R then the maximum current which can flow through the ring is

A metallic ring hangs vertically from a thread with its axis pointing E-W . A coil is fixed near to the ring and co-axial with it. When current in the coil is switch on,then the ring

In figure is shown a circular loop carrying current I. Show the direction of the magnetic field with the help of lines of force.

The ring B is coaxial with a solenoid A as shown in figure. As the switch S is closed at t=0 , the ring B

An aluminium ring hangs vertically from a thread with its axis pointing east-west. A coil is fixed mear to the ring and coaxial with it. What is the initial motion of the aluminium ring when the current in the coil is switched on?

Predict the direction of induced current in metal rings 1 and 2 when current I in the wire is steadily decreasing .

A thin rod, carrying current i_2 is placed near a long straight wire carrying current i_1 in the plane of rod as shown in figure. The motion of rod is

A segment AB of wire carrying current I_1 is placed perpendicular to a long straight wire carrying current I_2 as shown in figure. The magnitude of force experieced by the straight wire AB is

A rectangular loop is placed to the left of large current carrying straight wire as shown in Figure. Current varies with time as I=2t . Find direction of induced current I_("in") in the square loop.