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Electrical Engineering Electrical Machines Lab Experiments

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Load Test On Seperately Excited DC Motor

Choose difficulty:

Beginner

Intermediate

Advanced

A DC shunt motor works on the AC mains

a: unsatisfactorily Explanation

Explanation

b: satisfactorily Explanation

Explanation

c: not at all Explanation

Explanation

d: None of these Explanation

Explanation

In a DC Motor, unidirectional torque is generated with the help of

a: brushes Explanation

Explanation

b: commutator Explanation

Explanation

c: end plates Explanation

Explanation

d: both a and b Explanation

Explanation

The counter emf of a DC motor

a: Often exceeds the supply voltage Explanation

Explanation

b: aids the applied voltage Explanation

Explanation

c: helps in energy conservation(by controlling current input) Explanation

Explanation

d: regulates the armature voltage Explanation

Explanation

If pole flux of DC motor approaches to zero its speed will

a: approach a stable value between zero and infinity Explanation

Explanation

b: approach infinity Explanation

Explanation

c: no change due to corresponding change in back emf Explanation

Explanation

d: approach zero Explanation

Explanation

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