Question # 1

Colour codes are used to calculate the.

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Nature of resistor

Numerical value of resistance

Potential difference

Current

Energy density in an inductor is.

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Directly proportional to magnetic field

Directly proportional to square of magnetic field

Inversely proportional to magnetic field

Inversely proportional to square of magnetic field

Thermistor with high - ve temperature coefficient are very accurate for measuring low temperature especially near is.

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10 kelvin

70 kelvin

200 kelvin

35 kelvin

Two down and one up quarks make

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Proton

Neutron

~~photon~~

Positron

The symbol of p-n-p transistor is

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Which of the following is typical source of alpha particle.

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Strontium -94

Radon -222

Cobalt -60

Zic sulphate

The middle region of electric field is:

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Maximum field spot

Zero field spot

Perpendicular field spot

All of above

The current through a resistance of 100 Ohm when connecting across a source of 220 V is.

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22000 A

22 A

2.2 A

0.45 A

Photo copier and inkjet printer are the applications of

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Magnetism

Electricity

`.Electro magnetism

Electrostatics

The SI unit of E is NC-1 and that of B is Na-1 m-1 then the unit of E/B is.

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ms-2

ms

ms^-1

m-1s-1

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

The most refined form of matter is:

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Smoke

Light

Ice

Fog

Gauss's law can only be applied to.

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A curved surface

A flat surface

A closed surface

A surface of any shape

A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.

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0.1 J

10 J

100 J

1000 J

Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

In Wilson cloud chamber, if tracks are thick, straight and continuous, then particle is

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a-particles

ß-particles

Y-rays

All

The inductive reactance of a coil is direction proportional to.

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Inductance

Resistance

Frequency of A.C.

Both frequency of A.C. and inductance

The electric potential at a mid point in an electric dipole is.

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0 V

0.5 V

1 V

1.5 V

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