In majority of instruments damping is provided by
A). fluid friction
B). spring
C). eddy currents
D). all of the above
2. A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be
6. For crane travel which of the following motors is normally used?
7. Helical coils can be used on
8. In jaw crushers a motor has to often start against ________ load.
9. Depreciation charges are high in case of
10. When the frequency is decreased, the impedance of a parallel RL circuit