List of top Physics Questions on Transformers asked in MET

A step up transformer has turn ratio \(10:1\). A cell of emf \(2\,V\) is fed to the primary, then the secondary voltage developed is:

An observer looks at a tree of height 15 m with a telescope of magnifying power 10. To him the tree appears

In a step-up transformer the turn ratio is 1:2. A Leclanché cell (emf 1.5 V) is connected across the primary. The voltage across the secondary is:

The number of turns in primary coil of a transformer is 20 and the number of turns in the secondary is 10. If the voltage across the primary is 220 V, what is the voltage across the secondary?

The ore that is concentrated by froth floatation process is

A step-up transformer operates on a 230 V line and supplies a load of 2 A. The ratio of primary to secondary windings is 1:25. The current in the primary is: