Measurement And Instrumentation - Study Mode
[#171] In a moving coil instrument, the deflecting torque is proportional to
Correct Answer
(A) Current
[#172] In a moving iron meter, the deflecting torque is proportional to
Correct Answer
(B) Square of the current through the coil
[#173] Which wave has the least form factor?
Correct Answer
(A) Square wave
[#174] The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures
Correct Answer
(C) Reactive power of R phase
[#175] Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are
Correct Answer
(A) 360V and 240V