Question # 1

For the emission of electrons from the tungsten filament the values of current and voltage are taken as:

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0.1 A and 2V

0.2 A and 4V

0.3A and 6V

0.4A and 8V

To hear echoes, the minimum distance of the obstacle from source of sound should be:

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10m

15m

17m

20m

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

The S.I unit of intensity of sound is:

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Wm

Wm2

Wm-2

Wm-1

The SI the unit of charge is:

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Jpi;e

Volt

Coulomb

Watt

Mathematical formula of spring constant is:

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F/x

X/F

F/t

F/m

In variable capacitor, dielectric medium is:

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Paper

Air

Mica

Ceramic

Short form of information Technology is:

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IT

ITS

CBIS

IS

The speed of sound is air at 21 ^oC is:

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336 ms^-1

343 ms^-1

430 ms^-1

470 ms^-1

Optical fibre are:

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Cheap

Flexible

Lighter

All of these

At mean position of pendulum, the potential energy of the pendulum is:

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Maximum

Minimum

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Both a and c

According to coulomb’s law, what happens to the attraction of two oppositely charged objects as their distance of separation increases:

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Increases

Decreases

Remains unchanged

Cannot be determined

The waves, which are used to detect the broken bones, are called:

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Light waves

x-rays

Sound waves

both b,c,

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Physics 10th Class English Medium Online Test MCQs With Answers

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