Question # 1

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

Drum of photocopier is made of.

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Copper

Aluminum

Nickel

Cobalt

Which of the following is one of the spectral series of atomic hydrogen?

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Brockett series

Balmer series

P fund series

All of above

If a low resistance is connected parallel to a galvanometer then galvanometer is converted.

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Ammeter

Voltammeter

Ohmmeter

Multimeter

Circulation of blood is studied by radio isotope.

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Cobalt -60

Phosphorus -32

Sodium -24

Iodine -131

SI unit of electric flux is.

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NmC¹

Nm^-1 C¹

Nm²C^-1

Nm³C²

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

e/m=

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v/Br

Br/V

VB/r

Vr/B

The emf induced by the motion of a conductor across a magnetic field is called:

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Motional emf

Rotational emf

Induced emf

All of above

The emission of electrons from metal surface when exposed to light is called:

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Compton effect

Pair production

Photoelectric effect

None of above

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

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Band spectrum

Line spectrum

Continuous spectrum

Absorption spectrum

The value of Wien's constant:

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2.9x10^-3mk

2.19x10^-7mk

3.18 x10⁶ km^-1

6.21 x 10^-9m²wk³

In photovoltaic cell, current is directly proportional to.

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Wavelength of light

Intensity of light

Energy

Frequency of light

The number of Isotopes of cesium are.

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4

32

22

36

One use of a single p-n junction semiconductor in an electrical circuit is a

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Rectifier

Transistor

Battery

Diode

1 rad =

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0.001Gy

0.01Gy

0.1Gy

1.01Gy

The domain theory of magnet is important to explain the behaviour of

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Diamagnets

Paramagnets

Ferromagnets

All of these

The gate, which changes the logic level to its opposite level is called

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NOR gate

AND gate

OR gate

NOT gate

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