Which following is a two terminal three layer device?
Which following is a two terminal three layer device?
A. BJT
B. Power dioed
C. MOSFET
D. None of above
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In a load commutated DC – DC chopper, the capacitor has a_____________?
In a load commutated DC – DC chopper, the capacitor has a_____________?A. Symmetric triangular voltage across itself
B. Symmetric rectangular voltage across itself
C. Symmetric trapezoidal voltage across itself
D. Symmetric sinusoidal voltage across itselfWhen a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?
When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?A. CB
B. Snubber circuit
C. Voltage clamg device
D. Fast acting current limiting device (FACL fuse)During reverse recovery time__________________?
During reverse recovery time__________________?A. charge carrier of junction J2 recombined
B. charge carrier of junction J1 is swept out
C. charge carrier of junction J3 is swept out
D. both B and CThe output current in PWM DC – DC converters is equal to___________?
The output current in PWM DC – DC converters is equal to___________?A. Average value of the output inductor current
B. Product of an average inductor current and a function of duty ratio
C. Either A. or B.
D. None of theseThe ac voltage controller can be used for ___________?
The ac voltage controller can be used for ___________?A. Lighting and heating control
B. On – line transformer tap changing
C. Soft starting
D. All of theseA crowbar is a circuit which is used to protect a_____________?
A crowbar is a circuit which is used to protect a_____________?A. voltage sensitive load from excessive dc power supply output voltages
B. current sensitive load from excessive dc power supply output voltages
C. voltage sensitive load from excessive ac power supply output voltages
D. current sensitive load from excessive ac power supply output voltages