Question # 1

If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will:

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Refract only

Reflect only

Partially refract and partially reflect

Diffract only

Which of the following quantities is not change during refraction of light:

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Its direction

Its speed

Its frequency

Its wavelength

As the temperature of a conductor rises, its resistance.

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Increase

Decrease

Does not change

None of these

What happen to the atomic number of an element which emits one alpha particle?

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Increase by 1

Stays the same

Decrease by 2

Decrease by 1

study of charges at rest is called:

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acoustics

electrostatics

electronics

electricity

When resistance are connected in series the current passing through them is .

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Different

Zero

The same

None of these

Short form of information Technology is:

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IT

ITS

CBIS

IS

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

The S.I unit of Spring constant is:

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Nm

N

Nm-1

Ns

The value of K in SI unit is:

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9X10²⁰ Nm²C²

8X10⁹Nm²C²

9X10⁹Nm²C²

10X10^-9 Nm²C^-2

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

1 MB =

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1022KB

1023KB

1024KB

1025KB

If the mass of a spring mass system is doubled, its time period becomes:

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√2 T

T/2

√T/2

T/√2

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