Question # 1

In RLC circuit the energy is dissipated in

Choose an answer

R only

R and L

R and C

L and C

The internal resistance of a capacitor is called:

Choose an answer

Impedance

Resistance

Reactance

Conductance

The main use of A.C is

Choose an answer

Minimum line losses

Long distance transmission

Stepping up to required voltage only

Steeping down to required voltage only

The phase difference between the current and voltage at resonce is:

Choose an answer

0

π

-π

π/2

The peak value of alternating current is 5√2 A. The mean square value of current will be:

Choose an answer

5A

2.5A

5√2A

5²

A capacitor is perfectly insulator for:

Choose an answer

Direct current

Alternating current

Direct as well as alternating current

None of these

X_L=

Choose an answer

2πfL

1/2πfL

2πfL

fL/2π

Which consumes small power.

Choose an answer

Inductor

Resistor

Motor

All of these

In AC system we generate sine wave form because:

Choose an answer

It san be easily draw

It produces least disturbance in electrical circuits

It is nature standard

Other waves cannot be produced easily

In three phase A.C. generator the phase difference between each pair of coil is.

Choose an answer

45^o

90^o

120^o

60^o

The flow of D.C current is opposed by

Choose an answer

Resistor

Induction

Capacitor

All of these

Phase difference between V and I of an A.C through resistor is.

Choose an answer

Zero Degree

90 ^o

80^o

120^o

The combined effect of resistance and reactance in circuit is called:

Choose an answer

Impedance

Inductance

Capacitance

None of above

In frequency modulation which factor changed.

Choose an answer

Amplitude of charge carriers

Frequency of charge carriers

Amplitude of signal

Frequency of signal

The AC system is preferred to DC system because:

Choose an answer

AC voltage can be easily changed in magnitude

DC motor angular velocity is affected badly

High voltage AC transmission is less efficient

Domestic appliance require AC voltage for their operation

At high frequency, the current through a capacitor is

Choose an answer

Small

Infinity

Zero

Large

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

Choose an answer

Small

Zero

Large

Infinite

The condition of resonance is:

Choose an answer

XL = 1/2 Xc

X_L = X_c

X_c = 4_x2

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