PYQs Based test 16: Electrical & Electronic Measurements

An energy meter, having meter constant of $1200revolutions/kWh$, makes 20 revolutions in 30 seconds for a constant load. The load, in $kW$, is _____________.

In the Wein Bridge oscillator circuit shown in figure, the bridge is balanced when

The reading of the voltmeter (rms) in volts, for the circuit shown in the figure is –

The coils of a wattmeter have resistances 0.01 Ω and 1000 Ω ; their inductances may be neglected The wattmeter is connected as shown in figure, to measure the power consumed by a load, which draws 25A at power factor 0.8. The voltage across the load terminals is 30 V. The percentage error on the wattmeter reading is –

An unbalanced DC Wheatstone bridge is shown in the figure. At what value of P will the magnitude of Vₒ be maximum?