Question # 1

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these

The magnitude of back emf:

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Increases with sped of motor

Decreases with speed of motor

Remains same

None of above

In an nihilation emitted photons moves in opposite directions to conserve.

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Mass

Charge

Energy

Momentum

Two oppositely charged balls A and B attract the third ball C, when placed near them turn by turn The third ball C must be.

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Positively charged

Negatively charged

Electrically neutral

Positively and negatively charged

The highest value reached by the voltage or current in one cycle is called.

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Peak ot peak value

Peak value

Instantaneous value

Root mean square value

The early Greeks believed that matter waves was

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Discrete

Continuous

Both continuous and discrete

All of above

For Holography we use

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X ray

Laser

gama rays

Beta rays

If current flowing through a solenoid becomes four times, then magnetic field inside becomes.

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two times

three times

four times

Half

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

The value of e/m is smallest for

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Proton

Electron

Beta particle

Positron

An ammeter is an electrical instrument which is used to measure.

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Voltage

Current

Resistance

None

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

Mutual induction play role in.

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Generator

D.C. motor

Galvanometer

Transformer

We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to:

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Uncertainity Priciple

De-broglie Theory

Einstin Theory

Photo electric effect

Which one of the following is correct

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All of above

The force of Neutron due to field of 10² N/C is.

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1.6 x 10^-17N

1.6 x 10^-19N

Zero

1.6 x 10^-21N

The photon with energy greater than 1.02 MeV can interact with matter as.

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Photoelectric effect

Compton effect

Pair production

annihilation of matter

Circulation of blood is studied by radio isotope.

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Cobalt -60

Phosphorus -32

Sodium -24

Iodine -131

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