Question

A separately excited dc motor is run from a dc source through a chopper. At 600 rpm and rated torque, the duty cycle of chopper is 0.8. At 600 rpm and half the rated torque, the duty cycle is likely to be

a.

0.9

b.

0.8

c.

0.75

d.

0.6

Posted under Electronics and Communication Engineering

Answer: (c).0.75

Interact with the Community - Share Your Thoughts

Uncertain About the Answer? Seek Clarification Here.

Understand the Explanation? Include it Here.

Q. A separately excited dc motor is run from a dc source through a chopper. At 600 rpm and rated torque, the duty cycle of chopper is 0.8. At 600 rpm and half the rated torque, the...
Add Comment

Similar Questions

Explore Relevant Multiple Choice Questions (MCQs)

Q. A relaxation oscillator uses

View solution

Q. In a stud mounted SCR, the stud is

View solution

Q. In pulse width modulation of chopper

View solution

Q. In a full bridge inverter, the waveshape of load current depends on

View solution

Q. The characteristics of which device has peak point and valley point

View solution

Q. In brushless excitation system of modern alternators, the main exciter is

View solution

Q. The two-transistor model of a thyristor consists of two transistors :

View solution

Q. In a thyristor, the forward breakover voltage

View solution

Q. The gate lead, in a thyristor is welded to :

View solution

Q. In a 3 phase full converter, the firing angle is less than 60°. The instantaneous output voltage

View solution

Q. Which converter is used in HVDC transmission?

View solution

Q. Assertion (A): The turn on time of SCR is about 1 to 4 ms.

Reason (R): The turn off time of SCR is about 10 to 300 ms.

View solution

Q. Which chopper circuit operates in all the 4 quadrants?

View solution

Q. A single phase cycloconverter feeds a resistance heating load. The heating power is provided by

View solution

Q. A voltage VBB is applied across the terminals of a UJT. The emitter voltage at peak point is

View solution

Q. A single phase bridge type cycloconverter uses eight thyristors.

View solution

Q. In the basic series inverter circuit, the source supplies load

View solution

Q. In a 3 phase bridge inverter with 180° mode of operation the numbers of thyristors conducting at one time are

View solution

Q. A single phase full converter can operate in

View solution

Q. In a 3 phase semiconverter, the freewheeling diode comes into operation only if firing angle

View solution
View All MCQs on Electronics and Communication Engineering

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!

Cell Biology

Delve into the fascinating world of Cell Biology with our specialized category....

IC 89 Management Accounting

Boost your preparation for the IC 89 Management Accounting exam with our extensive...

IC38 Life Insurance Agent Exam

Prepare for success in the Insurance Institute of India (III) IC38 IRDA examination...

Drug and Pharmaceutical Biotechnology

Navigate the world of pharmaceuticals and biotechnology with our dedicated category....

Basic Electrical Engineering

Master the fundamentals of Electrical Engineering with our specialized category....

Verbal Ability

Hone your language and communication skills with our Verbal Ability category. Enhance...

Financial Management and Financial Markets

Master the world of finance with our Financial Management and Financial Markets...

Analytical Instrumentation

Dive into the world of precise measurements with our Analytical Instrumentation...

Environment Management

Master the art of Environment Management with our specialized category. Explore...