Question
Reason (R): If the time constant L/R of the load in chopper is low the current may become discontinuous.
a.
Both A and R are correct and R is correct explanation of A
b.
Both A and R correct but R is not correct explanation of A
c.
A is correct but R is wrong
d.
A is wrong but R is correct
Posted under Electronics and Communication Engineering
Interact with the Community - Share Your Thoughts
Uncertain About the Answer? Seek Clarification Here.
Understand the Explanation? Include it Here.
Q. Assertion (A): If the duty cycle of chopper is low the current would not become discontinuous Reason (R): If the time constant L/R of the load in chopper is low the current...
Similar Questions
Explore Relevant Multiple Choice Questions (MCQs)
Q. In a single phase full wave regulator, the firing angles in the positive and negative half cycles are generally
View solution
Q. An electric heater is controlled by thyristors through on-off control. If α = 0.4, the heating is
View solution
Q. A single phase half wave controlled rectifier circuit has a free wheeling diode. The load is a combination of R and L. The firing angle is α. The period of conduction of SCR and free wheeling diode respectively are
View solution
Q. Assertion (A): A transistor requires a continuous base signal for conduction but a thyristor requires a gate pulse.
Reason (R): Transistor find widespread application in power electronic circuits.
View solution
Q. In a thyristor the gate current is increased, then
View solution
Q. Thyristors are not suitable for logic circuits.
View solution
Q. In a circuit using a full wave converter (M - 2 connection) the PIV of each thyristor is 400 V. For the same output voltage and fully controlled bridge converter, PIV will be
View solution
Q. A dc separately excited motor has constant field current. The armature is fed from a single phase supply through a full converter. When α = 0, speed is 500 rpm. If α = 45°, the speed is likely to be
View solution
Q. In a multiphase chopper, all choppers operate together.
View solution
Q. The terminals of a power MOSFET are called
View solution
Q. Assertion (A): The surge current which an SCR can withstand is much higher than rms on state current.
Reason (R): The duration of surge current is very small.
View solution
Q. Current derating may be necessary when thyristors are operating in
View solution
Q. If duty cycle is a and the load is α resistance R, the rms value of output voltage is
View solution
Q. For a BJT, α = 0.98, then β =
View solution
Q. Assertion (A): Power transistor has lower switching time than SCR
Reason (R): Power transistor has greater switching time than SCR
View solution
Q. A 3 kV circuit uses SCR of 800 V rating. If derating is 25%, the number of SCRs in series is
View solution
Q. The number of doped regions in a SCR is
View solution
Q. All inverters use forced commutation.
View solution
Q. In 180° mode of operation of a 3 phase bridge inverter, two thyristors conduct at one time.
View solution
Q. In a single phase full wave ac regulator the rms value of load current is 20 A load is purely resistive. Then
View solution
Recommended Subjects
Are you eager to expand your knowledge beyond Electronics and Communication Engineering? We've handpicked a range of related categories that you might find intriguing.
Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!
