Question # 1

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Lens

Mirror

Electric field lines were introduced by:

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Faraday

Newton

Coulomb

Joule

which is a major cause of fires and explosions at many places:

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match sticks

bombs

static electricity

magnetism

In mathematical form of Ohm's law, "R" is:

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Resistance

Specific resistance

Resistor

Resistivity

In totally reflecting prism one angle is of 90^o, and other two angles are of:

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30^o,30^o

45^o,90^o

45^o,45^o

40^o,40^o

The waves which travel in straight line through space and have strong signals are called:

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Micro waves

Mechanical waves

Light waves

Magnet waves

The oscillations of a system in the presence of _____________ force are called amp oscillations:

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Resistive force

Attractive force

Both of these

None of these

The equivalent resistance of a parallel combination is:

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Equal to sum of all resistance

Is greater than the largest resistance of combination

Is smaller than the smallest resistance of combination

All of these

NOT gate is also called:

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Converter

Inverter

Transmitter

Receiver

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

If the mass of the bob of a pendulum is increased by a factor of 3. The period of the pendulum's motion will:

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Be increased by a factor 2

Remain the same

Be decreased by a factor of 2

Be decresaed by a facro of 4

When a positive charge of 2 coulombs is placed at a point in an electric field, it experiences a force of 6N. The intensity of electric field at this point is:

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6 NC^-1

3 NC^-1

12 NC^-1

1.5 NC^-1

The example of magnetic disk is:

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Compact disk

Floppy disk

Audio cassette

Video cassette

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