In a D.C. machine, short-circuited field coil will result in
A). odour of barning insulation
B). unbalanced magnetic pull producing vibrations
C). reduction of generated voltage for which excitation has to be increased to maintain the voltage
D). all above
2. Carbon bearings are used under which of the following conditions ?
4. Overhead system can be designed for operation up to
6. The desirable static characteristics of a measuring system are
7. Which meter is suitable for the measurement of 10 mV at 50 MHz?
8. The operating voltage of super-tension cables is up to
9. A practical voltage source has a nonzero internal resistance.
10. In Weston synchronoscope the moving coil is connected across