Question # 1

Two charged spheres are separated by 2 mm. Which of the following would produced the greatest attractive force?

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+1 q and +4q

-1 q and -4q

+2 q and +2q

+2 q and -2q

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

earth wire is connected with those appliances whose casing is made of:

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metals

wood

glass

plastic

Watt is equal to:

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Coulomb per second

Newton per second

Volt per second

Joule per second

The speed of sound in air is kmh^-1

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1243

1244

1245

1246

The parts of computer which can be seen and touched are called:

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Hardware

Software

Modem

CPU

The amount of current that can be painful is:

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0.005A

0.001A

1A

2A

The speed of sound of water at 25 ^oC is:

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1530 ms^-1

1531 ms^-1

1560 ms^-1

1570 ms^-1

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

The output of a two input NOR gate is 1 when:

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A is 1 and B is 0

A is 0 and B is 1

Both a and b are 0

Both a and b are 1

Old people cannot hear sound above than:

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1000 Hz

15000 Hz

20000 Hz

First voice signal was transmitted in the form of electrical signal in:

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1870

1875

1876

1880

The character by which lound and faint sound can be distinguished is called:

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Pitch

Quality

Loudness

Intensity

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