Question # 1

If a ray of light is 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

Sound waves are an example of:

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Transverse waves

Electromagnetic waves

Longitudinal waves

All of these

The minimum value of angle of deviation is called:

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Minimum angle

Incident angle

Angle of minimum deviation

None of these

Thye Water waves obey the laws of

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Reflection

Refraction

Diffraction

All of these

The output of a NAND gate is 0 when

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Both of its inputs are 0

Both of its inputs are 1

any of its inputs is 0

any of its inputs is 1

A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is:

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4 times smaller than before

4 times larger than before

8 times larger than before

16 times larger than before.

A data storage device is.

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Printer

Hard disk

Monitor

CPU

The value of acceleration in simple harmonic motion at mean position is

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Maximum

Zero

10 N

Both a , b

electric field is weak when:

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lines are far apart

lines are close together

no lines are present

lines are directed outside

The process by which electrons are emitted by a hot metal surface is

known as:

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Boiling

Evaportion

Conduction

Thermionic emission

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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Increase

Decreased

remain unchanged

can not be determined

The SI the unit of charge is:

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Jpi;e

Volt

Coulomb

Watt

Which device is used to show the change in the value of current or electrical potential as a graph?

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Cathode ray tube

Electron gun

Oscilloscope

Transformer

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