Question # 1

Average value of current and voltage over a complete cycle is.

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Positive

Negative

Zero

Infinite

In case of capacitor, the unit of reactance is

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Farad

Ohm

Newton

All of these

Main reason for world wide use of A.C. is

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It is cheaper

Transmitted

Botha a and b

Reaches in short time

In frequency modulation which factor changed.

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Amplitude of charge carriers

Frequency of charge carriers

Amplitude of signal

Frequency of signal

The effective value of any sinusoidal alternating current or voltage is

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None of the above

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

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Changing

Constant

Infinite

zero

The device which allows only the flow of D.C. is.

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Capacitors

transformer

Inductor

Generator

The sum of positive and negative peak value called.

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R.M.S. value

P-P value

Peak value

Average value

In a pure inductive A.C. circuit the current.

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Lags behind voltage by 90 ^o

Leads the voltage by 90 ^o

In phase with voltage

Leads the voltage by 270 ^o

The highest value reached by the voltage or current in one cycle is called.

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Peak ot peak value

Peak value

Instantaneous value

Root mean square value

In RLC circuit the energy is dissipated in

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R only

R and L

R and C

L and C

For electromagnetic waves, Maxwell generalized

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Gauses law for magnetism

Gauses law for eletricity

Fradays law

Amperes law

High frequency radio wave is called as

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Fluctuate

Carrier wave

Matter wave

Mechanical wave

The A.M. transmission frequencies range from

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540 KHz to 1000 KHz

540 Khz to 1600 KHz

520 KHz TO 1600 KHz

520 KHz TO 1400 KHz

X₁is low for low frequency Fy but Xc is.

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Zero

Low

High

Same is H

The unit of impedance is.

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Henry

Hertz

Ampere

Ohm

The circuit which compares the two voltages is.

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LDR

Sensor

Comparator

Logic gate

The combined effect of resistance and reactance is knows as.

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Inductance

Conductance

Resistance

Impedance

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