Question # 1

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 use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

Energy stored in an inductor is:

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1/2L²I

1/2L²/I

_1/2LI²

1/2LI

Light emitting diodes are made from semiconductors.

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Silicon

Germanium

Carbon

Gallium arsenide

The unit of temperature co efficient of resistivity is.

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Ohm -m

K-1

K

Ohm

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

Electric flux is a:

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Scalar quantity

Vector quantity

Variable quantity

None of these

The conventional current is due to the flow of

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Atoms and molecules

Positive charge

Negative charge

Bot (b) and (c)

Magnetic induction can be measured in units of.

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Tesla

Gauss

Weber/m2

All of the above

The potential barrier for silicon is.

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0.7 V

0.5 V

0.3 V

0.9 V

The color code of "Green"

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8

3

5

7

When a charge is projected perpendicular to a uniform magnetic field, tis path is

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Spiral

Helix

Ellipse

Circular

If a charged body is moved against the electric field it will gain.

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P.E.

K.E.

Mechanical energy

Electrical potential energy

The energy of the photon of wavelength 500 nm is.

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3.10 eV

2.49 eV

1.77 eV

1.52 eV

1 tesla =

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1 MAm^-1

1NA^-1m

1NA^-1m^-1

None of above

Kirchhoff's voltage rule is a way of stating conservation of.

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Mass

Charge

Energy

Momentum

The Kirchhoff 1^st rule is manifestation of:

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Law of conservation of mass

Law of Conservation of charge

Law of conservation of energy

None of above

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