Question # 1

The number of Isotopes of cesium are.

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4

32

22

36

In Wilson cloud chamber, ß-particles leave

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Thin and continuous tracks

Thick and continuous tracks

No tracks

Thin and discontinuous tracks

The current flowing through each resistor of equal resistance in parallel combination is.

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Same

Different

Zero

Infinite

Charge on an electron was determined by

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Ampere

Millikan

Maxwell

Bohr

If the distance between the two charged bodies is halved, the force between them becomes.

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Double

Half

Four times

One times

The position has charge which is in magnitude equal to the charge on

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Electron

Proton

β particle

All

Earth orbital speed is.

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10 km/s

20 km/s

30 km/s

40 km/s

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

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Peak to peak value

Peak value

Instantaneous value

Root mean square value

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

The slope of q-t curve at any instant of time gives.

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Voltage

Current

Charge

Botha a and b

A capacitor is perfectly insulator for:

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Direct current

Alternating current

Direct as well as alternating current

None of these

Heat sensitive resistors are called.

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resistors

Capacitor

Thermistors

Inductors

During negative half cycle of A.c then p-n junction offers.

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High resistance

Low resistance

No resistance

All of these

1 gray is equal to.

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1 JKg-1

1KgJ-1

1JKg

1 JKg-2

Yield stress is another name of

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Plasticity

Proportional limit

Elastic limit

Both (b) and (c)

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

The number of electrons emitted depends upon

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Colour of target surface

Shape of surface

Frequency of incident light

Intensity of incident light

A certain wire has a resistance R, the resistivity of an other wire of an identical material with the first, except for twice its diameter is.

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1/4 R

4R

2R

Same as R

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