Question # 1

In liquids and gases the current is due to the motion of:

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Negative charges

Positive charges

Both positive and negative charges

None of these

The value of K in SI unit is:

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9X10²⁰ Nm²C²

8X10⁹Nm²C²

9X10⁹Nm²C²

10X10^-9 Nm²C^-2

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

Mathematical formula of sound level (in bel) is:

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S.L = 10 log I/Io (bel)

S.L = K log I/Io (bel)

S.L = Log I/Io (bel)

S.L = 10 log Io/I (bel)

When resistances are connected in parallel, the current passing through them is:

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Same

Zero

Different

Infinite

From which of the following we can get information almost about everything:

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Book

Teacher

Computer

Internet

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 frequency is:

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Heartz

Vibration per second

Cycle per second

all a, b, c

The motion in which the friction reduces the mechanical energy of the system as times passes and the amplitude of motion reduces is called:

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SHM

Randum motion

Damped motion

None of these

When did Michael Faraday discover Electromagnetic induction?

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1841

1831

1821

1811

The refractive index of air is:

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6

7

2

1,0003

When the object is placed beyond 2F of a convex lens, the image formed will be:

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Real, inverted and smaller than the object

Real, inverted and of the same size as the object

Real, inverted and larger in size than the object

Virtual, erect and larger in size than the object

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

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