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

In alternating current, Inductors behave like

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

Power dissipated in pure inductor is:

The power factor in wattles current is

High frequency radio wave is called as:-.

Which of the following electromagnetic waves have shortest wavelength?

The combined effect of resistance and reactance is known as:

The frequency range. for F.M is given by

The flow of D.C. current is opposed by

In case of capacitor, the unit of reactance is:

The range of values of power factor is

The range or F.M transmission frequencies is from

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

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

As a result of modulation, the resulting wave is called

The power factor of an A.C circuit has.

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

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

A.C. through inductor, the applied voltage:

Waves we prefer for transmission of radio signals have

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

The process of combining the low frequency signal with a 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

AC can be converted into DC by:

The amplitude modulated transmission waves have frequencies range:

Choke used to limit high frequency A.C has

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

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

The power factor of RL-series circuit is :

Modulation can be achieved by

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 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?

Impedance Z can he expressed as;

Direct current cannot flow through

Dimensions of RC matches with

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

Electromagnetic waves are, generated when

Choke consumes extremely small:

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

In R-L series circuit phase angle is given by

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

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

The sum of positive and negative peak values is called:

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

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

Electromagnetic waves transport

AC voltmeter measure

AN inductor may store energy in:

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

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

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

The most common source of A.C is:

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

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

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

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

Direct current cannot flow through:

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

Capacitive reactance Xc =

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

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

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

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

The reactance Of capacitor is equal to

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

Main reasons for worldwide use of A. C is

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

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

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

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

The sum of positive and negative peak value is called

At high frequency the value of reactance of capacitor will he

The frequency of AC in Pakistan is;

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

During each cycle AC voltage reaches a peak value

Electromagnetic waves do not transport any:

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

The wire receiving the waves is known as

Power factor is equal to:

Electromagnetic waves emitted from radio antenna are:

Average value of current and voltage over a complete cycle is

In RLC parallel circuit the resonance frequency is

In pure RLC circuit, the energy is dissipated in:

The phase angle at +vc (positive) peak is

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

Choke coil in A.C circuit is used for

In the modulation process, low, frequency signal is called

The waveform of alternating voltage is a:

Which one is not present in AC generator?

The reactance of an inductor is

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

In a pure inductive A.C. circuit the current

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

In the modulation process, high frequency signal is called

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

The speed of electromagnetic wave in vacuum is given by

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