Question # 1

The Basic circuit element in a D.C. circuits which controls the current and voltage is

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Resistor

Inductor

Capisitor

Transistor

The energy equivalent of 1 kg of matter is about:

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10^-15 J

1 J

10^-12J

10^-17J

A charged particle having charge 'q' is moving at right angle to magnetic field. The quantity which varies is.

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Speed

Kinetic energy

Path of motion

angular velocity

The photoelectric effect predicts that light is made of

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Photons

Neutrons

Protons

None of these

The particles which do not experience strong force are called.

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Baryons

Hadrons

Mesons

Laptons

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

The algebraic sum of potential change in a closed circuit is zero.

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Kirchhoff's 1st rule

Kirchhoff 2^nd rule

Krichoff's 3^rd rule

Kirchhoff 4^th rule

Which is not fundamental logic gate.

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NOT

AND

OR

NAND

when an inductor comes close to a metallic object, its inductance is.

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Decreased

Increased

Becomes half

Becomes 4 times

A rheostat can be used as variable resistor as well as a-------------

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Potential divider

Current divider

Wheat stone bridge

Power divider

A real transformer does not change.

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Voltage level

Current level

Power level

Frequency

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

In according with Bohr's theory the K.E of the electron is equal to:

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ke²/2r

Ze²/r

Ze²/r²

Ze²/2r²

Very weak magnetic field produced by brain can be detected by

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MRI

CAT scans

Squid

CRO

A solid in which there is not regular arrangement of molecules is called.

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Glassy solid

Amorphous solid

Crystalline solid

Both a and b

When platinum is heated is become dull red at:

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900°C

500°C

800°C

1100°C

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

The amount of energy equivalent to 1 a.m.u is

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931.5 MeV

93.15 MeV

9.315 MeV

2.224 MeV

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