Define electric motor.
Define electric generator.
Define excitation.
What are the methods of excitation?
What do you mean by self excited machine?
What do you mean by separately excited
machine?
State the function of commutator.
What do you mean by commutation?
What is the purpose of brushes?
By which material yoke can be manufactured?
Why the brushes are made upon carbon?
What are the types of self excited generator?
Define shunt generator.
Define series generator.
Define compound generator.
Draw the open circuit characteristics of dc
separately excited generator.
What do you mean by magnetization curve?
Draw the load characteristics of separately
excited dc generator.
Draw the characteristics for DC shunt
generator.
Draw the characteristics of DC series
generator.
Draw the characteristics of DC compound
generator.
What is the principle of operation of dc
generator?
Write down faradey's law of electromagnetic
induction.
What is the principle of operation of DC
motor?
State lenz's law.
How Lenz's law is helpful for the operation of
DC motor?
Write the significance of back e.m.f.
Define back e.m.f.
Write the e.m.f. equation of DC generator.
Write down the voltage equation of DC motor.
Write the torque equation of DC motor.
Draw the characteristics of DC shunt motor.
Draw the characteristics of DC series motor.
Draw the characteristics of DC compound motor.
Differentiate differentially compound and
cumulatively compound motor.
What are the applications of DC shunt motor?
What are the applications of DC series motor?
What are the applications of DC compound
motor?
Why shunt motor is called as constant speed
machine?
Why starter is needed in DC motor?
What is the advantage of 4 point starter over
3 point starter?
State the function of no volt coil.
State the function of over load release.
What is the advantage of conducting
Swin-burne's test?
Draw the diagram of ward-leanord system of
speed control.
By which method, we can control the speed of
the motor below the base speed?
By which method, the speed control of the DC
motor be above the base speed?
What are the various methods of speed control
of DC motor?
Differentiate armature voltage control method
and field flux control method.
What do you mean by brake test?
Explain in detail the constructional details
of DC machine.
Derive the e.m.f. equation (8)
Draw and explain the characteristics of DC
generator.
Derive the torque equation/
Write down the significance of back e.m.f.
Write down the principle of operation of DC
motor.
Draw and explain the characteristics of DC
motor.
Draw and explain 3 point starter.
What is the draw back in 3 point starter and
how it is overcome in 4 point starter?
Explains the procedure of swin burne's test.
Draw and explain the speed control methods of
DC shunt motor.
Explain in detail about the ward-leonard
system of speed control of DC motor.
Problem.
State the principle of operation of
transformer.
What are the types of transformer according to
its construction?
Differentiate core type transformer and shell
type transformer.
Write down the e.m.f equation of transformer.
Write down the transformation ratio.
Define magneting current component.
Define working current component.
Draw the vector diagram of transformer an no
load.
How the resistance of the secondary be
referred in the primary?
Draw the approximate equivalent circuit of the
transformer.
Draw the vector diagram for the transformer
under resistive load.
Draw the vector diagram for the transformer
under inductive load.
Draw the vector diagram of the transformer
under comparative load.
When the transformer is said to be ideal?
Define voltage regulation of transformer.
Define voltage regulation up.
Define voltage regulation down.
By conducting no load test, which losses can
be found out?
Which losses can be found out by conducting
short circuit test?
What are the tests to be conducted on the
transformer?
Write the working principle of induction
motor.
How RMF is produced with the help of 3 phase
supply?
Define slip.
Write the working principle of 3f induction
motor.
Why 3f induction motor is called as rotating
transformer?
Can the rotor speed of induction motor be
synchronous speed?
What are the types of induction motor?
Write down the torque equation of 3f induction
motor.
Draw the slip-torque characteristics.
Draw the speed-torque characteristics.
State the relation between P2,
Pc
and Pm.
Draw the Power flow diagram of 3 phase
induction motor.
Draw the equivalent circuit of 3 f induction
motor.
Why starter is necessary in AC induction
motor?
What are the types of starters available to
start 3 f induction motor?
Why single phase induction motor is not self
starting?
How single phase induction motor is made to
start?
How the rotor is classified in 3f induction
motor?
How Rmf is produced in the stator of the
induction motor
What is Rmf?
What are the types of synchronous machines?
What is the basic principle of operation 3f
alternator?
Why
stationary armature is there in 3f alternator?
Write
down the e.m.f. equation of alternator.
What are
the types of 3 f alternator?
Define
voltage regulation of alternator?
What are
the methods to find out voltage regulation?
Why
synchronous impedance methods is called as pessimistic method?
What are the methods to find out voltage
regulation
Why synchronous impedance method is called as
pessimistic method?
Define synchronous impedance.
Why ampere-turns method is called as
optimistic method?
Draw the phasor diagram for voltage regulation
in synchronous impedance method.
How emf is induced in brushless alternator?
What is the function of rotating diode
assembly in brush can alternator?
What do you mean by brushless excitation?
How reluctance motor is running?
What is the operating principle of hysteresis
motor?
What are the types of stepper motor?
How do you find step angle in stepper motor?
Give the application of stepper motor.
What are the various sources of electric power
generating system?
What is the purpose of step up transformer in
electrical power system?
What do you mean by carona loss?
What is meant by Ferranti effect?
What are the advantages of AC transmission?
What are the advantages of DC transmission?
What are the types of distribution system?
What is EHUAC?
Define EHUDC.
What is the purpose of circuit breakers.
Define insulators.
Why the transmission is done through under
ground cable?
What are the advantages of under ground
cables?
What are the types of under ground cables?
What are types of insulators?
What is pin insulator? Where it is used?
What is stay insulator? Where it is used?
What are the purposes of insulator?
Define service mains.
Define grid.
Differentiate feeders and distributors.
