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Electrical Engineering Quiz 54

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Electrical Engineering Quiz 54

1 / 50

An SCR is turned off when ________________?

2 / 50

The load voltage is approximately constant when a Zener diode is ________________?

3 / 50

Which of the following devices will receive voltage surge first travelling on the transmission line ?

4 / 50

A JFET is similar in operation to ___________ valve?

5 / 50

In a certain five-step R/2R ladder network, the smallest resistor value is 1 k?. The largest value is___________?

6 / 50

In electrical-pneumatic system analogy the current is considered analogous to_____________?

7 / 50

A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is___________?

8 / 50

If the length of a cable is doubled, its capacitance____________?

9 / 50

Internal resistance of ideal voltage source is ?

10 / 50

The voltage gain in a transistor connected in___________arrangement is the highest?

11 / 50

The sensitivity of a voltmeter which uses a 100 ?A meter movement is ____________?

12 / 50

If L/C ratio of a parallel LC circuit is increased, the Q of the circuit______________?

13 / 50

In case of a flat compounded generator:

14 / 50

In amplitude modulation, bandwidth is ____________ the audio signal frequency?

15 / 50

The relative permittivity of free space is given by__________?

16 / 50

On which of the following factors does the resistivity of a material depend ?

17 / 50

The frequency response of transformer coupling is___________?

18 / 50

While conducting short-circuit test on a transformer the following side is short circuited?

19 / 50

Which of the following quantities remain the same in all parts of a series circuit ____________?

20 / 50

The stabilisation of operating point in potential divider method is provided by_______________?

21 / 50

The type of D.C. motor used for shears and punches is_____________?

22 / 50

In reverse blocking mode of a thyristor______?

23 / 50

The advantage of mercury arc rectifier is that________________?

24 / 50

Main causes of noisy solenoid are______________?

25 / 50

Dummy coil should not be used in_________________?

26 / 50

A magnetic field exists around____________?

27 / 50

The materials are a bit inferior conductors of magnetic flux than air

28 / 50

When a pure semiconductor is heated, its resistance_________________?

29 / 50

The temperature, under thermal and electrical system analogy, is considered analogous to_______________?

30 / 50

The transconductance of a JFET ranges from ________________?

31 / 50

The intersheaths in the cables are used to_____________?

32 / 50

Riunting in a synchronous motor takes place___________?

33 / 50

The conductivity of a conductor can be increased by_______________?

34 / 50

While starting a synchronous motor by induction motor action, field winding is usually_____________?

35 / 50

Photocopier and inject printer are dealt in________________?

36 / 50

The resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?

37 / 50

Which of the following are the passive elements?

38 / 50

For frequencies below resonant frequency, a series LC circuit behaves as a _____________ load?

39 / 50

The internal resistance of a lead-acid cell is that of Edison cell____________?

40 / 50

The safest value of current the human body can carry for more than 3 second is_________?

41 / 50

In a Wien-bridge oscillator, if the resistances in the positive feedback circuit are decreased, the frequency____________?

42 / 50

The capacitance, in force-current analogy, is analogous to_____________?

43 / 50

The most widely used rectifier is ________________?

44 / 50

The speed of a D.C. shunt motor is required to be more than full load speed. This is possible by______________?

45 / 50

A reverse biased pn junction has resistance of the order of________________?

46 / 50

In a single phase full wave rectifier, during blocking state the pea inverse voltage of diode is______________?

47 / 50

capacitor is to have an energy content of 20J it must be placed across a potential difference of________________?

48 / 50

In _________ machines, the size of the shaft is decided by the critical speed which depends on the deflection of the shaft?

49 / 50

The relay operating speed depends upon_________________?

50 / 50

has tendency to oscillate______________?

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