Question # 1

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)

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

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Choose an answer

I_cwill decrease

V_CEwill increase

I_Cwill increase

V_CCwill increase

At resonance frequency the impedance of parallel resonance circuit is

Choose an answer

Maximum

Minimum

Zero

None of the above

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Choose an answer

transformer

rectifier

filter

none of these

A diode characteristic curve is a plot between

Choose an answer

current and time

voltage and time

voltage and current

forward voltage and reversed voltage

Which of the following has a great concentration of impurity

Choose an answer

base

emitter

collector

none of these

Which of the following diodes can operate in the reverse biased condition

Choose an answer

photo diode

light emitting diode

photo voltaic cell

none of these

The average of A.C. current and voltage over a complete cycle is

Choose an answer

Maximum

zero

Neither zero nor maximum

None of these

When the emitter-base junction of a transistor is reverse biased, collector current

Choose an answer

Reverses

Increases

Decreases

Stops

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

Which of the following diode is used for the detection of light

Choose an answer

photo diode

light emitting diode

photo voltaic cell

all of them

In a transistor, the central region is called

Choose an answer

collector

emitter

base

none of them

Which one of the following is correct?

Choose an answer

V_o= 1.414 V_rms

I_ams= 1.414 I_o

VO = 10.70 Vrms

Both a and b

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Choose an answer

Instantaneous value

RMS value

Value averaged over a cycle

Either (B) or (C)

Either (A) or (C)

The magnitude of alternative voltage V:

Choose an answer

Always increase

Always decrease

Remains constant

Does not remain constant

None of these

During the positive half-cycle in the half-wave rectification,the diode

Choose an answer

does not conduct

conducts

either of these

neither of these

When the p-n junction is forward biased its resistance is of the order of

Choose an answer

few mega ohms

few kilo ohms

few ohms

few milli ohms

The bridge circuit of full wave rectification uses

Choose an answer

one diode

two diode

three diode

four diode

When either L or C is increased, the resonant frequency of the RLC series circuit

Choose an answer

Increases

Decreases

Remains the same

Becomes zero

More Classes

Other Links

ECAT Pre General Science 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

Choose an answer

Choose an answer

Choose an answer

Choose an answer