Question # 1

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 force on a charge particle moving parallel to magnetic field is:

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Maximum

Minimum

Zero

None of these

Electric flux is a:

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Scalar quantity

Vector quantity

Variable quantity

None of these

1 gray is equal to.

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1 JKg-1

1KgJ-1

1JKg

1 JKg-2

Light of 4.5 eV is incident on a Cesium surface and stopping potential is 0.25 eV, maximum K.E. of emitted electron is.

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4.5 eV

4.25 eV

4.75 eV

0.25 eV

Energy needed to produce an electron hole in solid state detector is.

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1 to 2 eV

3 to 4 eV

6 to 7 eV

8 to 9 eV

The anodes in cathode ray oscilloscope.

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Control number of waves

Control brightness of sept formed

Accelerate as well as focus beam

Negative potential w.r.t to chithode

An AVO meter can also be called as.

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Digital multimeter

Digital voltmeter

Digital ammeter

Digital ohm meter

The minimum energy required for occurrence of pair production is:

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1.022eV

1.02keV

1.02Me.V

1.04MeV

Two parallel wires carrying currents in the opposite direction.

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Repel each other

Attract each other

Have no effect upon each other

They cancel out their individual magnetic fields.

The electric field created by positive charge is

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Radially inward

Zero

Circular

Radially outward

Electron volt is unit of:

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Chemical energy

Potential energy

Nuclear energy

heat energy

Albert Einstein got noble prize in:

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1926

1921

1918

1931

For Holography we use

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X ray

Laser

gama rays

Beta rays

Gauss's law can only be applied to.

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A curved surface

A flat surface

A closed surface

A surface of any shape

When transistor are used in digital circuits they usually operate in the :

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Active region

Break down region

Saturation & cutoff regions

Linear region

Shear modulus is expressed as:

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G = tanθ/F/A

F/A/tanθ

F/tanθ

tanθ/A

Coercive force is used to

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Demagnetize the material

Magnetize the material

Extend it

None of these

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