SSC JE EE: Electrical and Electric Instrumentation Booster Quiz-4

A 25V range voltmeter is rated for 75 μA full-scale current total resistance of voltmeter is ?

If M is mutual inductance between fixed coil and moving coil and θ is deflection, then:

Which of the following work on the principle of series resonance?

For measurement of large current by D’arsonval galvanometer a resistance connected across the meter the value of this resistance should be?

Which type of damping used for moving Iron instruments?

A weight of 6 gram is used as the controlling weight in a gravity-controlled instrument. Find tis distance from spindle if the deflecting torque corresponding to a deflection of 60° is 1.25 × 10^–3 Nm.

In CRO electrons accelerated by the ?

Misuse of instrument is which type of error?

A 230A, singe phase, watt hour meter has a constant load of 5A passing through it for 4 hour at unity power factor. If the meter disc makes 1200 revolutions during this period find meter constant of meter.

In measurement of power on balanced load by two watt meter method is a 3-phasse circuit, what will be the readings of the wattmeter if the load power factor angle is zero?