Question # 1

The highest value reached by the voltage or current:

Choose an answer

In quarter cycle is called Instantaneous value

In half cycle is called peak-to-peak value

In one cycle is called peak value

In half cycle is called Instantaneous value

None of these

In RLC series circuit, resonance occurs when

Choose an answer

X_{L > Xc}

X_{L < Xc}

X_{L = Xc}

None of these

Alternating current is produced by a voltage source which polarity:

Choose an answer

Remains the same

Reverse after period T

Keeps on reversing with time

Reverse after every time interval T/2

Both (C) and (D)

An A.C varies as a function of

Choose an answer

Current

Voltage

Time

Charge

If 250V is the RMS value of alternative voltage, then its peak value V_owill be:

Choose an answer

353.5V

250V

175V

zero

400V

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Choose an answer

photo diode

light emitting diode

photo voltaic cell

none of these

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Choose an answer

Hydal water

Geothermal energy

Solar energy

Biomass

Both (B) and (D)

A changing magnetic flux creates around itself

Choose an answer

An electromotive force

An electric field (changing electric flux)

Magnetic field

None of the above

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Choose an answer

inverting input

non-inverting input

any one of the input terminal

none of them

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Choose an answer

photo diode

light emitting diode

photo voltaic cell

all of them

Alternating current can be transmitted:

Choose an answer

To long distance

At very high cost

At very low cost

Both (A) and (C)

Both (A) and (B)

The basic circuit element in D.C. circuit is:

Choose an answer

A capacitor

A resistor

An inductor

Both (A) and (C)

Both (A) and (B)

The r.m.s. value of alternating current is equal to its maximum value at angle of

Choose an answer

60°

45°

30°

90°

Peak value of alternative current is:

Choose an answer

one of its Instantaneous value

Equal to its RMS value

The same as its peak-to-peak value

Both (B) and (C)

None of these

The value of current gain of n-p-n transistor is of the order of

Choose an answer

tens

hundreds

thousands

ten thousands

Alternating current can induce voltage because it has a

Choose an answer

High peak value

Varying magnetic field

Stronger field than direct curren

Constant magnetic field

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 16 Alternating Current Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer