Question # 1

An A.C varies as a function of

Choose an answer

Current

Voltage

Time

Charge

The sum of positive and negative peak values is called:

Choose an answer

Instantaneous value

Peak value

Rms valuie

Peak-to peak-value

None of these

A P-N juction or semiconductor diode cannot be used as

Choose an answer

A rectifier

Detector

Oscillator

An amplifier

In a transistor, if the central region is n-type, then this type of transistor is known as

Choose an answer

n-p-n transistor

p-n-p transistor

either of these

none of these

In half wave rectification

Choose an answer

both halves of the input voltage is used

only one half of the input voltage is used

either of these

none of these

During the negative half-cycle of the half-wave rectification, the diode

Choose an answer

does not conduct

conducts

either of these

none of these

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Choose an answer

5.07 pF

50 pF

0.507 pF

507 pF

The wave form of alternating voltage is the graph between:

Choose an answer

Voltage across X-axis and time across y-axis

Current and time

Voltage along y-axis and time along x-axis

Voltage and current

Either (B) or (D)

The most common source of alternating voltage is:

Choose an answer

Motor

Transformer

AC genrator

Both (A) and (C)

Both (A) and (B)

When the pn-junction is in reversed biased, current flows through the junction due to the

Choose an answer

majority carriers

minority carriers

either of them

none of them

The phase angle of a series RLC circuit at resonance is

Choose an answer

180°

90°

0°

None of the these

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)

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)

In frequency modulation (FM), the carrier waves amplitude

Choose an answer

Remains constant

Increase

Decreases

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

A resonance curve for RLC series circuit is a plot of frequency versus

Choose an answer

Voltage

Current

Impedance

Reactance

More Classes

Other Links

ECAT Physics 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