Question # 1

The sum of positive and negative peak value called.

Choose an answer

R.M.S. value

P-P value

Peak value

Average value

At high frequency the value of reactance of capacitor will be.

Choose an answer

Small

Zero

Large

Infinite

An electromagnetic wave goes from air to glass which of the following does not change?

Choose an answer

Radio waves

X-rays

Ultra violet radiation

Ultra sond waves

The most common source of an A.C. Voltage is.

Choose an answer

Motor

Cell

Generator

Thermo couple

Radio frequency choke is

Choose an answer

Iron cored

Air Cored

Air as well as iron cored

None of these

The device which allows only the continuous flow of AC through it is.

Choose an answer

Inductor

Battery

Thermistor

Capacitor

An alternating quantity (voltage or current) is completely known if we know its:

Choose an answer

Maximum

Frequency and phase

Effective value

Both (a) & (b)

Vrms =

Choose an answer

0.7V_∘

0.07V_∘

0.007V_∘

0.75V_∘

At resonance, the behavior of R-L-C series circuit is.

Choose an answer

Resistive

Capacitive

Inductive

Modulative

In purely resistive A.C circuit, instantaneous value of voltage and current:

Choose an answer

Current lags behind voltage

Current leads voltage by π/2

Both are in Phase

Voltage leads current by Pase θ=π/2

Unit of impedance is:

Choose an answer

Ohm

Ohm^-1

no unit

Ohm m^-1

In three phase A.C supply coils are inclined at an angle of.

Choose an answer

0^o

90^o

120^o

80^o

Power dissipation in A.C circuit is expressed as:

Choose an answer

P =I_rms x V_rms Sinθ

IxVCosθ

I_rmsxV_rmsCosθ

I_rms x V_rms Sin2θ

The basic circuit element in A.C. circuit which controls current.

Choose an answer

Resistor only

Capacitor only

Inductor only

All of these

An A.C. voltmeter reads 220 V, its peak value will be

Choose an answer

225 V

240 V

311.12 V

300 V

The phase angle of a series RLC circult at resonant frequency is

Choose an answer

1/2

sigma

Zero

sigma /4

when an inductor comes close to a metallic object, its inductance is.

Choose an answer

Decreased

Increased

Becomes half

Becomes 4 times

In Series resonance circuit the impedance of circuit art resonance frequency, is

Choose an answer

Maximum

Minimum

It is unequal to R

None of above

More Classes

Other Links

Physics ICS Part 2 Chapter 16 Online MCQ's 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