Question # 1

Transmitting antenna emits

Choose an answer

Magnetic waves

Electric waves

Electromagnetic waves

Sound waves

The bridge circuit of full wave rectification uses

Choose an answer

one diode

two diode

three diode

four diode

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

Choose an answer

tens

hundreds

thousands

ten thousands

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Choose an answer

base and emitter

collector and emitter

base and collector

any one of these

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)

For a n-p-n transistor, the conventional current equation can be written as

Choose an answer

I_E+ I_C= I_B

I_C- I_B= I_E

I_C+ I_B= I_E

I_B+ I_E= I_C

The RMS value of alternating current is:

Choose an answer

0.7 times at the peak value

0.5 times the peak value

0.7 times the Instantaneous value

Equal to maximum voltage

None of these

In describing functions of digital systems, a closed switch will be shown as

Choose an answer

0

1

low

any one of these

The length of rotating vector (on a certain scale) represents the:

Choose an answer

Peak value of alternating quantity

RMS value of alternating quantity

Instantaneous value of alternating quantity

Either (B) or (C)

Either (A) or (B)

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

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

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Choose an answer

3525.0 volts

35.35 volts

353.5 volts

3.535 volts

The total reactance of a series RLC circuit at resonance is

Choose an answer

zero

Equal to the resistance

Infinity

Capacitive

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

During each cycle, alternating voltage reaches a peak value

Choose an answer

One time

Two times

Four times

A number of times depending on the frequency

For the normal operation of the transistor, its

Choose an answer

emitter-base and collector base junctions are forward biased

emitter-base junction is reversed biased and collector base junction is forward biased

emitter-base junction is forward biased and collector-base junction is reverse biased

any one of these

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

The value of the potential difference across the depletion region for the case of germanium is

Choose an answer

0.3 V

0.5 V

0.7 V

0.9 V

The power factor of resonant series circuit is

Choose an answer

1

0

-1

0.5

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

Choose an answer

Choose an answer

Choose an answer

Choose an answer