Question # 1

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)

The closed loop gain of the non-inverting amplifier is given by

Choose an answer

G = R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

G = 1 + T₂/R₁

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

Choose an answer

p-n-p transistor

n-p-n transistor

either of these

none of these

In series RC circuit when R=X_c, then the phase angle is

Choose an answer

0°

90°

70°

45°

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

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

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 one of the following waves belongs to electromagnetic spectrum

Choose an answer

Radio and TV waves

Radar waves

Micro waves

All of them

Most OP-AMP operates with

Choose an answer

+ 6 V supply

+ 10 V supply

+ 12 V supply

+ 24 V supply

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

The entire wave form of sinusoidal voltage is actually a set of all the:

Choose an answer

Positive maximum value + V_oand negative maximum value -V_o

Posiotive maximum value +V_oand zero

Zero and negative maximum value -V_o

Any of these

None of these

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

Choose an answer

Voltage

Current

Impedance

Reactance

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

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Choose an answer

9.4 kHz

940 kHz

94 kHz

None of these

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

The open loop gain of OP-AMP is of the order of

Choose an answer

10²

10³

10⁴

10⁵

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