Question # 1

Grid in cathode ray oscilloscope controls.

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Number of electron

Temperature of filament

Frequency of electron

Energy of electrons

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

The potential difference between the head and tail of an electrical to

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600 Volt

700 Volt

800 Volt

900 Volt

In metal detector, we use.

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L-C circuit

R-L circuit

R-C circuit

RLC series circuit

The galvanometer can be made sensitive by making the factor BAN/C

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Large

Small

Constant

Zero

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

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Widened

Narrowed

Normal

None of these

The wave form of alternating voltage is a

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Cotangent curve

Cosine curve

Sine curve

Tangent curve

The first spectral lines were discovered in 1885, were

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Paschen series

Balmer series

Pfund series

Bracket series

In Compton effect the photon behaves as a.

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Wave

Particle

Nucleon

Both a and b

The crystalline structure of NaCl is.

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Cubical

Hexagonal

Tri gonal

Tetragonal

Farad is defined as

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"Coulomb/Volt

Ampere /Volt

Coulomb /Joule

Volt/Coulomb

Nuclear fission was discovered by:

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Otto Hahn

Friz strassmann

Both a and b

Michaelson

Balmer series lies in

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Visible region

Invisible region

Ultraviolet region

Infrared region

Which is the most refined form of matter.

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Smoke

Fog

Light

Electron

Which is true for both alpha particle and gama rays.

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They cause ionization in air

They can be deflected by electric field

They can be deflected by magnetic field

The y can penetrate a few millimeters of aluminium

Thermosouple is an arrangement of two different metals:

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Two convert heat energy into electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electrical energy into heat energy

Step up transformer is used.

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Step up D.C. voltage

Step up A.C. voltage

Step up both A.C and D.C.

Step up A.C. current

Unit (S.I) of temperature coefficient of resistivity of a material is

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K

K^-1

^oC

K^-2

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