Question # 1

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

The unit of induced emf is

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Ampere

Volt

Joule/coulomb

Both (b) and (c)

By emitting Beta particle and gama particle simultaneously the nucleolus changes in its charges by

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N

N/2

N/4

3N/4

The electric field lines are closer where the field is

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Strong

Weak

Uniform

Variable

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

The circuit in which current and voltage are in phase, the power factor is:

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Zero

1

-1

2

Production of x rays is reverse process of

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Photo electric effect

Compton effect

An nihilation

Pair production

A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when:

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q=Q/4

q=Q/2

q=Q

None of these

Electric flux is a:

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Scalar quantity

Vector quantity

Variable quantity

None of these

The device which are required to convert various physical quantities into electric voltage are called.

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Filters

Rectifiers

Amplifiers

Sensors

Lenz's law deals with

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Magnitude of emf

Direction emf

Direction of induced current

Resistance

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

Which one is pentavalent impurity

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Boron

Gallium

Antimony

Indium

Heat generated by a 40 W bulb in one hour is.

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140 J

1440 J

14400 J

144000 J

In case of op-amp as an inverting amplifier, V₊ - V_- = 0, this is because

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Open gain loop is very low

Closed loop gain is very high

Open loop gain is very high

Both (a) and (a)

In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to:

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Infinite energy

Maximum energy

Minimum energy

Zero energy

Example of ductile substance is.

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Glass

Wood

Lead

Oxygen

The vessel containing the tow electrodes and liquid to known as.

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Chemical cell

Volt cell

Volta cell

Volta meter

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