Question # 1

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

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

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

SI unit of impedance is

Choose an answer

hertz

henry

ampere

ohms

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Choose an answer

X-rays

Ultraviolet rays

y-rays

Cosmic rays

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

Choose an answer

0

1

low

any one of these

The output voltage of half wave rectification is in the form of

Choose an answer

a smooth curve

a smooth wave

pulses

all of the above

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 amplifier which us used to perform mathematical operations electronically is known as

Choose an answer

calculator

OP-AMP

computer

any one of them

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 a normally biased n-p-n transistor, an electron c current I_Eflows from the

Choose an answer

emitter into the base

collector into the base

base into collector

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 basic circuit element in A.C. circuits are:

Choose an answer

Resistor and capacitor

Resistor and Inductor

Capacitor only

Both (B) and (C)

None of these

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

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

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

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 output resistance of OP-AMOP is of the order of

Choose an answer

few ohms

few hundred ohms

several kilo ohms

several mega ohms

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)

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)

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

Choose an answer

Choose an answer

Choose an answer

Choose an answer