In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

DGVCL Exam Paper (11-12-2011)
In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

Universal motor

Reluctance motor

Induction motor

Synchronous motor

Universal motor

Reluctance motor

Induction motor

Synchronous motor

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
The mutual inductance between two unity coupled coils of 9 H and 4 H is

2.2 H

6 H

36 H

13 H

2.2 H

6 H

36 H

13 H

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
At time t= 0+ , with zero initial condition, which of the following acts as a short circuit?

Resistor

Voltage source

Capacitor

Conductor

Resistor

Voltage source

Capacitor

Conductor

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

Split phase motor

Capacitor start capacitor run motor

Capacitor start motor

Universal motor

Split phase motor

Capacitor start capacitor run motor

Capacitor start motor

Universal motor

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
Which of the following correctly represents the sequence of operations of isolator, circiut breaker and earthing switch while opening a circuit?

Close circuit breaker-close isolator - open earthing switch

Close earthing switch - open ciruit- breaker-open islotor

Open isolator close circuit breaker-open earthing switch

Open circuit breaker-open isolator-close earthing switch

Close circuit breaker-close isolator - open earthing switch

Close earthing switch - open ciruit- breaker-open islotor

Open isolator close circuit breaker-open earthing switch

Open circuit breaker-open isolator-close earthing switch

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

0.6 leading

0.8 lagging

0.5 leading

0.6 lagging

0.6 leading

0.8 lagging

0.5 leading

0.6 lagging

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

DGVCL Exam Paper (11-12-2011) The mutual inductance between two unity coupled coils of 9 H and 4 H is

DGVCL Exam Paper (11-12-2011) At time t= 0+ , with zero initial condition, which of the following acts as a short circuit?

DGVCL Exam Paper (11-12-2011) The motor used in celling fans is

DGVCL Exam Paper (11-12-2011) Which of the following correctly represents the sequence of operations of isolator, circiut breaker and earthing switch while opening a circuit?

DGVCL Exam Paper (11-12-2011) An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

DGVCL Exam Paper (11-12-2011)
In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

DGVCL Exam Paper (11-12-2011)
The mutual inductance between two unity coupled coils of 9 H and 4 H is

DGVCL Exam Paper (11-12-2011)
At time t= 0+ , with zero initial condition, which of the following acts as a short circuit?

DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

DGVCL Exam Paper (11-12-2011)
Which of the following correctly represents the sequence of operations of isolator, circiut breaker and earthing switch while opening a circuit?

DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be