Question # 1

Alternating current can be transmitted:

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To long distance

At very high cost

At very low cost

Both (A) and (C)

Both (A) and (B)

Nowadays, Most of the electric energy is produced by the A.C. generators using:

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Hydal water

Geothermal energy

Solar energy

Biomass

Both (B) and (D)

For a n-p-n transistor, the conventional current equation can be written as

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I_E+ I_C= I_B

I_C- I_B= I_E

I_C+ I_B= I_E

I_B+ I_E= I_C

The output voltage of half wave rectification is in the form of

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a smooth curve

a smooth wave

pulses

all of the above

A diode characteristic curve is a plot between

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current and time

voltage and time

voltage and current

forward voltage and reversed voltage

Electromagnetic waves transmit energy equal to

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1/2 mv²

m_oc²

hf/c

hf

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

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inverting input

non-inverting input

any one of the input terminal

none of them

Conversion of alternating current into direct current is called

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amplification

rectification

conduction

polarization

The phase angle of a series RLC circuit at resonance is

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180°

90°

0°

None of the these

The Instantaneous value of alternative current maybe:

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The same as its RMS value

Greater than its Rms value

The same as its peak value

Any of these

None of these

When the pn-junction is forward biased. the current flows through it is of the order of

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mili-amperes

amperes

nano-amperes

micro-amperes

The r.m.s. value of alternating current is equal to its maximum value at angle of

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60°

45°

30°

90°

Transmitting antenna emits

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Magnetic waves

Electric waves

Electromagnetic waves

Sound waves

A P-N juction or semiconductor diode cannot be used as

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A rectifier

Detector

Oscillator

An amplifier

During the positive half-cycle in the half-wave rectification,the diode

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does not conduct

conducts

either of these

neither of these

Which one of the following waves belongs to electromagnetic spectrum

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Radio and TV waves

Radar waves

Micro waves

All of them

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