Power factor is equal to:

In Pakistan, the frequency of A.C. supply is :

The power factor in wattles current is

The sum of positive and negative peak value is called

Power dissipated in pure inductor is:

Electromagnetic waves do not transport any:

The amplitude modulation (A.M.) transmission, frequencies range from

In an electromagnetic waves, the electric and magnetic field are:

The combined effect of resistance and reactance is known as:

In the modulation process, low, frequency signal is called

Impedance Z can he expressed as;

When we accelerate the charges, which type of waves are produced.

Main reasons for worldwide use of A. C is

The opposition offered by a capacitor.to the flow of an A. C is called

Direct current cannot flow through:

In alternating current, Inductors behave like

In a pure inductive A.C. circuit the current

A.C. through inductor, the applied voltage:

Direct current cannot flow through

The frequency of electromagnetic waves received through a LC - circuit is adjusted by

The range or F.M transmission frequencies is from

The phase angle between the voltage and current through resistor is:

AC voltmeter measure

The velocity of an oscillating charge as it moves to and fro along a wire is:

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

The waveform of alternating voltage is a:

When electrons in a transmitting antenna vibrate 94000 times each having frequency:

The highest value reached by the Voltage or current in one cycle is called;

The sum of positive and negative peak values is called:

The amplitude modulated transmission waves have frequencies range:

The flow of D.C. current is opposed by

The impedance. Of RLC series circuit at, resonance is equal to;

The slope of q-t curve at any instant of time gives:

During each cycle AC voltage reaches a peak value

The frequency of A.C. source used in Pakistan is;

Dimensions of RC matches with

In tuning circuit if capacitance is doubled and inductance is halved then its frequency

The mean value of A.C. in a cycle is :

In RIC series circuit Xl=Xc Which of the following will be the power factor?

In case of capacitor, the unit of reactance is:

The speed of electromagnetic wave in vacuum is given by

For frequency modulated signal, the frequency of the modulated carrier wave is lowest when the signal amplitude is at its

Capacitive reactance Xc =

The basic circuit element in a D.0 circuit which controls the current and voltage is

Choke consumes extremely small:

At resonance frequency, the impedance of RLC - Parallel Circuit is

Which of the following electromagnetic waves have shortest wavelength?

In R-L-C Circuit, the energy is dissipated in:

100 μf capacitor is connected to an AC-voltage of 24 V and frequency of 50 Hz. The reactance of the capacitor is

AN inductor may store energy in:

As a result of modulation, the resulting wave is called

Choke coil in A.C circuit is used for

The peak value of A.C is 2?2 A Which of the following will be its apparent value?

Electromagnetic waves are, generated when

In the modulation process, high frequency signal is called

The phase difference between current and voltage in an Inductive circuit is

AC can be converted into DC by:

An electric bulb is designed to operate at 12V DC. It is connected to AC and gives same brightness then peak AC value of voltage is

The piece of wire through which charges are made to accelerate by mean o me waves is known as

The frequency of the range 20 to.20,000 Iii is:

The sharpness of resonance RLC series resonant circuit, as the resistance of the circuit is increased,

Which of the following is the time taken by an A.C of frequency 50 Hz to complete one cycle?

For frequency modulated signal, the frequency of the modulated carrier wave is highest when the signal amplitude is at its

In RLC series circuit at resonance the phase difference between capacitor and inductor reactance's is:

The power factor of RL-series circuit is :

Electromagnetic waves transport

The effective value of A.C in a circuit is 10A Which of the following will be its peak value.

In pure RLC circuit, the energy is dissipated in:

The phase angle at +vc (positive) peak is

The power factor of an A.C circuit has.

The range of values of power factor is

In RLC parallel circuit the resonance frequency is

For frequency modulated signal, the frequency of the modulated carrier wave is at its normal value when the signal amplitude is at its

The reactance of an inductor is

High frequency radio wave is called as:-.

The process of combining the low frequency signal with a high frequency signal is called

The frequency range. for F.M is given by

In three phase AC generator the phase difference between each pair of coil is:

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

Choke used to limit high frequency A.C has

Electromagnetic waves emitted from radio antenna are:

The peak value of A.C source is 20 A, then its rrms value will be:

Which of the following radiations forms the part of electromagnetic spectrum?

If E and B be electric and magnetic field vectors of an electromagnetic wave, Then propagation of wave then propagation of wave is along the direction of

The velocity of an oscillating charge as it moves to and fro along the wire is

At resonance frequency, the impedance of RLC series circuit is:

The frequency modulation (F.M.) transmission, frequencies range from

Waves we prefer for transmission of radio signals have

The most common source of A.C is:

Modulation can be achieved by

In R-L series circuit phase angle is given by

At high frequency the value of reactance of capacitor will he

Average value of current and voltage over a complete cycle is

Which one is not present in AC generator?

The frequency of AC in Pakistan is;

The reactance Of capacitor is equal to

The reactance of a capacitor at 50Hz is 10 Ohm Which of the following will be its reactance at 100 Hz?

In our radio receiver set, when we change station, or change the frequency we actually adjust the :due of

The wire receiving the waves is known as