A pilot exciter is provided on generators for which of the following reasons ?
A). To excite the poles of main exciter
B). To provide requisite starting torque to main exciter
C). To provide requisite starting torque to generator
D). None of the above
1. The relative permeability of materials is not constant.
2. A conditionally stable system exhibits poor stability at
3. are used for construction of core of electromagnets.
4. During charging the specific gravity of the electrolyte of a lead-acid battery
5. The superposition theorem requires as many circuits to be solved as there are
6. The frequency and time domain are related through which of the following?
7. Which of the following materials does not have covalent bonds ?
8. Overfluxing protection is recommended for
9. The voltage drop, for constant voltage transmission is compensated by installing
10. Which of the following motors is used for unity power factor ?