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Electrical Engineering Quiz 59

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Electrical Engineering Quiz 59

1 / 50

Which of the following circuit elements will oppose the change in circuit current ?

2 / 50

In a load curve the highest point represents______________?

3 / 50

A glass rod when rubbed with silk cloth is charged because__________?

4 / 50

The design of mechanical parts is particularly important in case of __________ speed machines?

5 / 50

A VTVM has_____________input resistance than that of a multi meter?

6 / 50

Materials exhibiting zero value of resistivity are known as ____________ ?

7 / 50

Which of the following single-phase motors is suitable for timing and control purposes ?

8 / 50

A 12 k? resistor, a 15 k? resistor, and a 22 k? resistor are in series with two 10 k? resistors that are in parallel. The source voltage is 75 V. Current through the 15 k? resistor is approximately___________?

9 / 50

The loads on distributors systems are generally__________________?

10 / 50

A conductor carries 125 amperes of current under 60? to a magnetic field of 1.1 tesla. The force on the conductor will be nearly______________?

11 / 50

A 10 V power supply would use ____________ as filter capacitor?

12 / 50

In the case of an unsymmetrical alternating current the average value must always be taken over__________?

13 / 50

Compared to transistor, _________ have lower on state conduction losses and higher power handling capability?

14 / 50

In BJT, the forward biased base emitter junction inject holes from base to emitter, the holes_______?

15 / 50

The arc voltage produced in A.C. circuit breaker is always_____________?

16 / 50

Which of the following insulation is used in cables ?

17 / 50

The purpose of providing iron core in a step-up transformer is?

18 / 50

The purpose of using short-circuit gear is___________?

19 / 50

The capacity of a crane is expressed in terms of_______________?

20 / 50

___________________has least range of speed control?

21 / 50

The commonly used material for shielding or screening magnetism is____________?

22 / 50

Double tuned circuits are used in ____________ stages of a radio receiver?

23 / 50

Two D.C. shunt generators, each with armature resistance of 0.02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. If their e.m.fs. are 270 V and 265 V, their bus bar voltage will be_____________________?

24 / 50

Leakage current flows through the thyristor in_________?

25 / 50

In a three-phase induction motor__________?

26 / 50

Which of the following, in a thermal power plant, is not a fixed cost?

27 / 50

Light duty cranes are used in which of the following ?

28 / 50

In an RC coupling scheme, the coupling capacitor CC must be large enough______________?

29 / 50

If the input capacitor of a transistor amplifier is short-circuited, then_________________?

30 / 50

A thyristor is basically________?

31 / 50

In a D.C. generator:___________________?

32 / 50

In a transistor, the base current is about_________of emitter current?

33 / 50

In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?

34 / 50

A transistor behaves as a linear device for _____________?

35 / 50

In an RC coupled amplifier, the voltage gain over mid-frequency range_____________?

36 / 50

The power factor of a D.C. circuit is always__________?

37 / 50

Which of the following should be used for extinguishing electrical fires?

38 / 50

Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is______________?

39 / 50

A cable carrying alternating current has__________?

40 / 50

Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately___________?

41 / 50

At _______ frequencies the parallel R-L circuit behaves as purely resistive

42 / 50

Addition of 0.3 to 4.5% silicon to iron ________ the electrical resistivity of iron?

43 / 50

The chemical used in breather for transformer should have the quality of____________?

44 / 50

If two charges are increased by two times then force_____________?

45 / 50

For constant torque drive which speed control method is preferred ?

46 / 50

Which of the following is the non-linearity caused by servomotor ?

47 / 50

In an AC co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be_____________?

48 / 50

The transient currents are associated with the____________?

49 / 50

Which of the following is a bilateral element?

50 / 50

An ammeter should have_____________ resistance?

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