1. Measuring range of voltmeter can be extended by using
- high shunt resistance
- high series resistance
- low shunt resistance
- low series resistance
2. The function of a shunt in an ammeter is to
- increase the instrument resistance
- bypass the current
- reduce the voltage drop across the instrument coil
- increase the current flowing through the instrument coil
3. A moving instrument has a resistance of 0.6Ω and a full-scale deflection current of 0.1A. To convert it into an ammeter 0-15A range, the resistance of shunt should be
- 0.6Ω
- 0.06Ω
- 0.1Ω
- 0.004Ω
4. High ac voltage are usually measured with
- magnetic voltmeter
- inductive voltmeter
- potential transformer with voltmeter
- current transformers and voltmeter
5. Which instrument has lowest resistance?
- ammeter
- voltmeter
- frequency meter
- meggar
6. All meters used for measuring current, voltage, and resistance are basically
- voltmeter
- ammeter
- multimeter
- none of the above
7. Which of the following is used to measure the resistance of an electrical installation?
- multimeter
- ammeter and voltmeter
- maxwell’s bridge
- meggar
8. Meggar is an instrument used for measuring
- high resistance and insulation resistance
- medium resistance
- low resistance
- leakage current
9. Which of the following statement associated with purely resistive circuits is correct?
- PF is unity
- power consumed is zero
- heat produced is zero
- PF is zero
10. A leading power factor implies
- current leads the voltage
- current lags behind the voltage
- voltage leads the current
- none of the above