Which of the following motors is used in tape-recorders ?
A). Hysteresis motor
B). Reluctance motor
C). Capacitor-run motor
D). Universal motor
1. Coefficient of adhesion reduces due to the presence of which of the following?
2. Which of the following is not the standard voltage for power supply in India?
4. In case of high speed universal motor which of the following needs more attention ?
5. The efficiency of a plant is of least concern when it is selected as
6. A change in the value of the emitter resistance Re in a differential amplifier
7. Is an element used in semiconductors whose atoms have three valence electrons.
8. On the average the ampere-hour efficiency of an Edison cell is about
9. Life of the Edison cell is at least
10. Which of the following circuit element stores energy in the electromagnetic field?