A. gate current increases from 90 % to 100 % of its final value
B. anode current reaches 10 % from forward leakage current
C. anode voltage drops from 100 % to 90 % of its actual value
D. all of these
Related Mcqs:
- Rise time is defined by the interval when____________?
A. gate current rises from 90 % to 100 % of it final value
B. anode voltage drops from 90 % to 10 % of its initial value
C. anode current rises 10 % to 90 % of its final value
D. both B and C - Spread time is defined as the interval during which_____________?
A. anode voltage drops from 10 % of its initial value to zero
B. anode current rises from 90 % to its final value
C. both (A) and (B)
D. anode current rises from 10 % to 90 % of its final value - A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is _____?
A. 30° to 150°.
B. 30° to 180°.
C. 60° to 120°.
D. 60° to 180°. - What is used to protect the SCR from over current ________________?
A. CB and fuse.
B. Heat sink.
C. Snubber circuit.
D. Voltage clamping device. - Thyristor is nothing but a____________?
A. Controlled transistor
B. Controlled switch
C. Amplifier with higher gain
D. Amplifier with large current gain - 4 thyristors rated 200 V in series. The operating voltage of the string is 600 V. Derating factor of the string is_____________________?
A. 0.75
B. 0.7
C. 0.2
D. 0.25 - In radiative coupling, the emitter radiation field_____________?
A. Decays as 1 / R, where R is the separation distance between the emitter and the receptor
B. Decays as R, where R is the separation distance between the emitter and the receptor
C. Decays as 1 / 2 R, where R is the separation distance between the emitter and the receptor
D. Decays as 2R, where R is the separation distance between the emitter and the receptor - For a buck converter to reduce the conduction losses in diode
A. A high on – resistance switch can be added in parallel
B. A low on – resistance switch can be added in parallel
C. A high on – resistance switch can be added in series
D. A low on – resistance switch can be added in series - In constant frequency PWM, at perturbation the amplitude of the sinusoidal component is a___________?
A. Linear function
B. Non linear function
C. Constant function
D. None of these - The power demand can be estimated approximately by____________?
A. Load survey method
B. Mathematical method
C. Statistical method
D. Economic parameters
