A dynamometer wattmeter can be used for
1). Both D.C. and A.C. if scales are calibrated
2). D.C. only
3). A.C. only
4). Both AC and DC without any calibration of scale
1. The output of a feedback control system must be a function of
2. The impedance of an RL circuit varies inversely with frequency.
3. A Class-S Emergency Position-Indicating Radio Beacon (E.P.I.R.B)
4. A good voltage regulation of a transformer means
5. For which of the following applications motor has to start with high acceleration?
6. For the same draught produced the power of induced draught fan as compared to forced draught fan is
8. The negative feed back in an amplifier
10. The insulation on a current carrying conductor is provided