Question # 1

If 10 A current passes through 100 mH inductor, then energy stored is.

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100 J

5 J

20 J

Zero

A voltmeter is always connected in

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Parallel

Series

Perpendicular

Straight line

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

Magnetic lines of force are.

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Imaginary

Real

Perpendicular

In phase with electric lines of force

Two resistance of 2 Ohm each are connected in parallel combination equivalent resistance will be.

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4 Ohm

2 Ohm

1 Ohm

8 Ohm

The minimum frequency needed to emit an electron form metal surface is called:

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Work function

Threshold frequency

Quanta frequency

All of above

In glass, molecules are irregularly arranged so it is known as.

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Solid

Liquid

Solid liquid

Gas

The Compton effect is associated with

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X-rays

y-rays

Positive rays

ß-rays

In Helium Neon laser, discharge tube is filled with Neon gas.

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10%

15%

85%

90%

The electromagnetic spectrum contains

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Radio waves

X-rays

Microwaves

All of these

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

Iodine -131 is used for the treatment by

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Bones

Eyes

thyroid glands

Lungs

A real transformer does not change.

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Voltage level

Current level

Power level

Frequency

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

Circulation of blood is studied by radio isotope.

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Cobalt -60

Phosphorus -32

Sodium -24

Iodine -131

The place for soring the nuclear waste is

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Ocean

Damping in earth

Damping in desert

Bottom of old salt mines

The unit of impedance is.

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Henry

Hertz

Ampere

Ohm

Insulators have:

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An empty conduction band

Al full valence band

A large energy gap

All of above

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