SSC JE EE Quiz: Electrical and Electric Instrumentation Booster Quiz-17

An ammeter is assumed to have a perfect square law response. It gives a full scale deflection for a current of 40A . The current which causes half scale deflection is

In a CRO astigmatism is?

The damping used in electrostatic meters

An energy meter is designed to make 100 revolutions of disc for one unit of energy. If load carrying current 40A at 230V and 0.4 power factor for an hour. If it actually makes 360 revolution the percentage error is

For the Lissajous pattern shown below, if the horizontal frequency is 54 Hz, then the value of vertical frequency will be

When measuring power with an electro dynamometer wattmeter in a circuit where the load current is large.

A (0 – 5) mA Ammeter with internal resistance of 500 Ω is used to design a DC voltmeter of full scale voltage of 50V. The value of require external resistance.

A wattmeter will read zero under the following condition