Rajkamal Sir (Engineers Platform) 📚📚

5. In an auto-transformer, the number of turns in the primary winding is 210 and in the secondary winding is 140. If the input current is 60A, the currents in the output and in the common winding are respectively.

4. A 100/10 V, 50 VA transformer is converted to 100V/110V auto transformer, the rating of the auto transformer will be

3. Which of the following is the main advantage of an auto-transformer over a two winding transformer?

2. The essential feature of an auto-transformer is that it

1. Auto transformer has

5. The household energy meter is

4. is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another,

3. A potentiometer may be used for