Question # 1

The first theory about the structure of an atom was introduced by

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Neil Bohr

Einstein

Compton

Rutherford

Number of electros emitted in photo electric effect depend upon.

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Intensity of incident light

Frequency of incident light

Energy of incident light

Wavelength of incident of light

The reverse saturation current in a PN junction diode is only due to:

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Majority carriers

Minoritycarriers

Acceptor ions

Donor ions

The solid with definite M.L are called:

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Crystalline

Amorphous

Polymeric

None of above

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

A° is the unit of:

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Energy

Length

Nuclear energy

Work

The use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

Which type of impurity is to be added to a pure semi conductor crystal to provide holes.

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Monovalent

Trivalent

Tetravalent

Pentavalent

A positron is a particle having.

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Mass equal to electron

Charge equal to electron

Mass equal to mass of electron but charge opposite to charge of electron.

Mass equal to proton

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

Energy stored in an inductor is:

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1/2L²I

1/2L²/I

_1/2LI²

1/2LI

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

For electromagnetic waves, Maxwell generalized

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Gauses law for magnetism

Gauses law for eletricity

Fradays law

Amperes law

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

The minimum energy required for occurrence of pair production is:

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1.022eV

1.02keV

1.02Me.V

1.04MeV

In D.C. generator, split rings act as.

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Capacitor

Commutator

Resistor

Inductor

The wave form of alternating voltage is a

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Cotangent curve

Cosine curve

Sine curve

Tangent curve

A.C. can be converted into D.C. by

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An oscillator

Detector

An amplifier

Rectifier

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