RRB/SSC JE Electrical 2019 || Measurements Quiz 4

What is the reading (in kW) of both the wattmeter, when measuring the power of
a three-phase three wire system having
an input of 5 kW and power factor of 0.866?

In ‘two-wattmeter method’ of power calculation of a 3-phase balanced star connected system, what is the power factor of the system if both the wattmeters show a positive reading?

Which of the following can be used to measure frequency?

Which of the following is the CORRECT expression for the series resistance required to convert a galvanometer (having internal resistance ‘G’) into voltmeter?

Determine the deflection factor (in V/m) of a CRO, when the deflection sensitivity of the CRO is 4 m/V.