UP polytechnic Lecturer (EE) Quiz 7

Hay’s Bridge

The suitable detector for high voltage Schering bridge.

A 1-φ, 230 V energy meter has a meter constant of 400 rev/kWh. Find number of revolutions made by the disc at a load current of 20A 0.86 lagging power factor.

The value of “Δr” under balanced condition

Two wattmeter method is used to measure the power consumption by the star connected balanced inductive load. At which load PF of both wattmeter will read equal

The resistor’s R1 = 37 Ω ± 5%, R2 = 50 Ω ± 5% and R3 = 75 Ω ± 5% are connected in series. Find the equivalent resistance and it’s % limiting error.

Consider the integrator of integrating DVM have 200 kΩ resistance and 4 μF capacitor. Find the value of V₁ is ___________ volts.

For 0 to 19999 counts DVM, minimum voltage measured by DVM (in mV) in 200 V range is:

The braking torque is

The resolution of  digit DVM on 10 V range is _________