The flux through a loop as a function of time is given by the graph in the diagram. Sketch a graph of the emf induced in the loop as a function of time.

The flux through a loop as a function of time is given by the graph. Sketch a graph of the emf induced as a function of time.

The diagram shows a top view of two solenoids with their axes parallel, one with a smaller diameter so that it fits inside the other. The bigger solenoid has a current flowing in the clockwise direction (looked at from above) and the current is increasing in magnitude; find the direction of induced current in the smaller solenoid.

A metallic ring is dropped from a height above a bar magnet as shown in the diagram. Determine the direction of the induced current in the ring as the ring approaches the magnet(as shown in the figure below) in each case, giving full explanations.

A magnet dropped from above into a metallic ring is as shown in the diagram. Determine the direction of the induced current in the ring in each case.

A metallic ring is dropped from a height above a bar magnet as shown in the diagram. Find the direction of magnetic force on the metallic ring as it enters into its magnetic field.

A metallic ring is dropped from a height above a bar magnet as shown in the diagram. Find the direction of the magnetic force on the metallic ring as it leaves its magnetic field.

A metallic rod of length $L$ is dragged with constant velocity $v$ in a region of magnetic field directed into the page (shaded region), as shown in the diagram. By considering the force on electrons inside the rod, show that the ends of the rod will become oppositely charged. Determine the end that is positively charged.

Find the direction of the induced current in the loop, shown in the diagram, as the current in the straight wire increases.

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