Question # 1

In case of OR and AND operation, if switches s₁ and s₂ both are open then lamp is:

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On

Off

Sometimes on and sometimes off

Neither on nor off

If we double the distance between two charges, then force becomes

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4-times

1/4th

Double

Half

Mathematical formula of capacitance of a capacitor is:

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C = QV

C = Q/V

C = V/Q

C = V2/Q

The unit of intensity of sound:

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Wm^-1

Wm^-2

Wm

Wm²

When frequency of sound wave is increased, which of the following decreases:WavelengthPeriodAmplitude

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(i) Only

(iii) Only

(i) And (ii) only

(i) And (iii) only

Sound waves having frequency higher than 20,000 Hz are called:

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Ultrasonic

Infrasonic

Audible

Echo

In the presence of a charged body, an insulated conductor develops positive charge at one end and negative charge at the other end, this i- called:

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Electrostatics

Electrostatic induction

Magnetism

Electromagnetic induction

The 1st practical electric battery is known as:

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Voltaic

Pile

Voltaic pile

Voltaic cell

Electric intensity is a quantity.

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Scalar

Vector

Base

None of these

The basic operations performed by a computer are:

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Arithmetic operations

Non-arithmetic operations

Logical operations

Both a and c

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral charge

Repels a neutral chage

Old people cannot hear sound above than:

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1000 Hz

15000 Hz

20000 Hz

At room temperature, electrons cannot escape the metal surface due to ………….. of atomic nucleus:

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Repulsive forces

Attractive forces

Gravitational forces

Electromagnetic forces

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