Q1
NAT[2 Marks]
In a Wheatstone bridge with P = 2000 ohm, Q = 500 ohm, R = 3000 ohm, find the value of S for bridge balance.
Type:
Bridges, Meters & Instrumentation
8 QuestionsQ2
MSQ[1 Mark]
Which instrument(s) are required to synchronize an alternator to the grid?
Q3
NAT[1 Mark]
Find the maximum percentage error in the equivalent resistance of 100 ohm and 900 ohm parallel resistors with 5% error each.
Q4
NAT[2 Marks]
Using three-voltmeter method with R = 2 ohm, V_source = 200 V, V_R = 9 V, V_load = 199 V, find load active power in W.
Q5
NAT[2 Marks]
For the Wheatstone bridge with R = 50 ohm, S = 5 kohm, P = 10 ohm, Q = 1 kohm, source = 10 V, find sensitivity dE/dR in mV/ohm.
Q6
MCQ[1 Mark]
Match the instrument transformers (CT, PT) with their correct operational features.
Q7
MCQ[2 Marks]
A 3-phase star-connected balanced load has line current 2 A from 400 V source. A wattmeter reads -400 W. Find the per-phase load power factor.
Q8
MCQ[1 Mark]
For a balanced Wheatstone bridge with given arm resistances and tolerances, find R_CD and its accuracy.