The working of magnetic braking of trains is based on

Assertion: $A$ laminated core is used in transformers to increase eddy currents.
Reason: The efficiency of a transformer increases with increase in eddy currents.

The plane of eddy currents makes an angle with the plane of magnetic lines of force equal to $...^o$.

$A$ metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in a horizontal direction so that the pendulum now swings through the field,the pendulum will

The core of a transformer is laminated so that

We can reduce eddy currents in the core of a transformer by: