The turns-ratio of a step up transformer is 1:10 and a current of 1.5 A is passed through the primary at 220 V. Obtain the values of voltage and the current in the secondary.

A transformer with primary to secondary turns ratio of 1 : 2, is connected to an alternator of voltage 200 V. A current of 4 A is flowing through the primary coil. Calculate the voltage and the current flowing in the secondary.

Two resistances of 5 ohm and 10 ohm are connected in parallel and then a current is passed through them from a battery of 6 volt. Calculate the currents drawn from the battery and also the currents flowing through each of the resistances.

Three electrolytic cells A, B and C containing electrolytes ZnSO_4 , AgNO_3 and CuSO_4 respectively were connected in series. A steady current of 1.5A was passed through them. 1.45g Ag were deposited at the cathode of cell B. How long did the current flow?(Atomic mass of Cu = 63.5u, Zn = 65.3u, Ag = 108u.)

Define the turn ratio, voltage ratio and current ratio of a transformer.