The reactance Of capacitor is equal to

Direct current cannot flow through:

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

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

Electromagnetic waves do not transport any:

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

Modulation can be achieved by

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

The most common source of A.C is:

Power factor is equal to:

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

Choke coil in A.C circuit is used for

Average value of current and voltage over a complete cycle is

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

The frequency of AC in Pakistan is;

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

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

Electromagnetic waves transport

At high frequency the value of reactance of capacitor will he

As a result of modulation, the resulting wave is called

The combined effect of resistance and reactance is known as:

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

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

Main reasons for worldwide use of A. C is

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

AC can be converted into DC by:

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

The speed of electromagnetic wave in vacuum is given by

The range of values of power factor is

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

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

A.C. through inductor, the applied voltage:

Direct current cannot flow through

During each cycle AC voltage reaches a peak value

Power dissipated in pure inductor is:

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

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

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

In alternating current, Inductors behave like

Choke used to limit high frequency A.C has

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

The power factor of RL-series circuit is :

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

Electromagnetic waves are, generated when

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

Which of the following electromagnetic waves have shortest wavelength?

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

Choke consumes extremely small:

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

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

The flow of D.C. current is opposed by

High frequency radio wave is called as:-.

The amplitude modulated transmission waves have frequencies range:

In the modulation process, low, frequency signal is called

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

In pure RLC circuit, the energy is dissipated in:

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

The frequency range. for F.M is given by

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

AN inductor may store energy in:

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

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

Which one is not present in AC generator?

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

The sum of positive and negative peak values is called:

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

In R-L series circuit phase angle is given by

The reactance of an inductor is

The power factor of an A.C circuit has.

Dimensions of RC matches with

The range or F.M transmission frequencies is from

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

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

Waves we prefer for transmission of radio signals have

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 lowest when the signal amplitude is at its

The power factor in wattles current is

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

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

AC voltmeter measure

The phase angle at +vc (positive) peak is

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

Capacitive reactance Xc =

Electromagnetic waves emitted from radio antenna are:

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

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

In a pure inductive A.C. circuit the current

In case of capacitor, the unit of reactance is:

In the modulation process, high frequency signal is called

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

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

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

The wire receiving the waves is known as

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

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

In RLC parallel circuit the resonance frequency is

The sum of positive and negative peak value is called

The waveform of alternating voltage is a:

Impedance Z can he expressed as;