The power factor of a single-phase load can be calculated if the instruments available are
The power factor of a single-phase load can be calculated if the instruments available are
1). one voltmeter and one ammeter
2). one voltmeter, one ammeter and one wattmeter
3). one voltmeter, one ammeter and one energy meter
4). any of the above
1 answers
We know that, Power factor $(\cos \phi = \frac{P}{{VI}})$
To calculate power factor, we need the values of power (P), voltage (V) and current (I). So, we need one voltmeter, one ammeter and one wattmeter.Other Questions
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