Question # 1

In SI the unit of charge is:

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Joule

Volt

Coulomb

Watt

Focal length for concave mirror is :

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-ve

+ve

same

none of these

The formula of time period of simple pendulum is:

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T = 2π √L/g

T = 2π (L/g)

T = 2π√1/g

T = 1/2π √L/g

the phenomena which is used in applying paints on the surface of different articles is called:

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electroplating

electroscope

electrostatic induction

electrolytes

The basic operations performed by a computer are:

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Arithmetic operations

Non-arithmetic operations

Logical operations

Both a and c

Sound waves having frequency lower than 20 Hz are called:

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Ultrasonic

Infrasonic

Audible

Echo

Which statement is true about the magnetic poles?

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Unlike poles repel

Like poles attract

Magnetic poles do not effect each other

A single magnetic pole does not exist

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

known as:

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Boiling

Evaportion

Conduction

Thermionic emission

Information storage devices work on the principles of

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Heat

Sound

Light

Magnetism

Value of ‘k’ depends upon:

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System of unit

Nature of medium

Both a and b

None of these

Time period is reciprocal of:

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Frequency

Cycle

Wavelength

Amplitude

A converging mirror with a radius of 20cm creates a real image 30 cm from the mirror. What is the object distance:

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5.0 cm

7.5 cm

15 cm

20 cm

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

What is the voltage across a 6 Ω resistor when 3 A of current passes through it:

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2 V

9V

18 V

36 V

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