BARC EE : Measurement Quiz-3

The internal resistance of ammeters and voltmeter are 1 Ω and 1 KΩ respectively. If these meters are used to measure DC power. Find the value of load resistance at which error in V-A and A-V method is same.

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 sum of W1 and W2 for 200 V (L-L), 50 Hz supply

A 0-100 mA PMMC instrument is used to measure a voltage of 50 V. Calculate the value of multiplication factor ‘m’ and resistance to be placed in series with instrument taking meter resistance R_M = 25 Ω.

(0-100) V voltmeter has a guaranteed accuracy of 1% of full scale reading. Calculate % limiting error while measuring 50 V and 75 V respectively.

A coil is tuned to resonate at 400 kHz with a resonating capacitor of 30 pF. At 200 kHz; the resonance is obtained with a resonating capacitor of 150 pF. The self-capacitance of coil is _____________.

The energy meter having K = 1500 rev/ KWh is found to make 6 revolutions in 66 seconds. What could be the possible load power ?

What will be the value of “X” when bridge is balanced ?

Find R1 and L1 shown in figure when bridge is balanced.

Two wattmeter method is used to measure the power consumption by the star connected balanced inductive load. At 0.5 PF which wattmeter shows no deflection