For the given circuit the internal resistance of the ammeters as well as that of the current coil of the wattmeter are zero, and the voltmeters have a very large figure of merit. $${A_1}$$ is a $$6A$$ full scale moving $${\rm I}$$ron type meter. $${A_2}$$ is a commercial full wave rectifier type meter of full scale $$5A$$. $${V_1}$$ is a $$500V$$ meter is an peak response type. $${V_2}$$ is a $$300V$$ $$PMMC$$ type meter and $$W$$ is an electro dynamometer type, $$5A$$, $$230V$$ wattmeter. Determine the readings of $${A_1},$$ $${A_2},$$ $${V_1},$$ $${V_2},$$ and $$W.$$

Electro dynamic type watt meters have large errors while measuring power in a.c circuits at low power factor conditions, since the voltage across and the current though the

The voltage phasor of a circuit is $$10\angle {15^ \circ }V$$ and the current phasor is $$2\angle - {45^ \circ }A.$$ The active and the reactive powers in the circuit are

For a dual $$ADC$$ type $$3\,\,{1 \over 2}$$ digit $$DVM$$, the reference voltage is $$100mV$$ and the first integration time is set to $$300$$$$ms$$. For some input voltage, the ''deintegration'' period is $$370.2ms$$. The $$DVM$$ will indicate