Question # 1

Rectification is the process of converting.

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D.C. into A.C.

A.C. in to D.C.

Low signal to high

High signal to low

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

In case of op-amp as an inverting amplifier, V₊ - V_- = 0, this is because

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Open gain loop is very low

Closed loop gain is very high

Open loop gain is very high

Both (a) and (a)

The potential difference across the depletion region of germanium is.

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0.3 V

0.5 V

0.7 V

0.8 V

For rectification we use.

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Transformer

Diode

Choke

Generator

Photo diode detects.

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Visible light

Radio waves

X rays

All of them

The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.

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Ohms

Kilo Ohms

Mega Ohms

Thounds Ohms

The potential difference across depletion region in case of Si is

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0.6 volt

0.9 volt

0.7 volt

0.2 volt

Most of the electrons in the base of an NPN transistor flow:

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Out of the base lead

Into the collector

Into the emit

Into the base supply

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

The input resistance of an op amplifier is.

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Low

High

Zero

Equal to output resistance

The device which is used as amplifier and works with the negative feedback is.

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Operational amplifier

P-n-p transistor

n-p-n transistor

Transistor

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be:

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Neutral

Forward biased

Reversed biased

None of above

For normal use:

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Emitter base function is reversed biased

Collector base junction is reserved biased

Emitter base junction is forward biased

Both c and b

Improper bisting of a transistor circiut produces:

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Heavy loading of emitter current

Distortion in the output output signal

Excessive heat at collector terminal

Faculty location of load line

When a PN-Junction is reverse biased the depletion region is.

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Widened

Narrowed

Normal

None of these

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Physics FSC Part 2 Chapter 18 Online MCQ's Test MCQs With Answers

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