11.A step up transformer is used on 120 V line to provide a P. D. of 2400 V. If the number of turns is 75, then the number of turns in the secondary shall be

12.A power transmission line feed input power at 2200 V to a step down transformer, with its primary windings having 3000 turns in secondary windings should be

13.If in a galvanometer the coil is wound on a bad conductor, the eddy current will be

14.Eddy currents are also known as

15.Lenz s law gives the