Question # 1

AND operation is represented by:

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Dot (.)

Addition (+)

Division (÷)

Minus (-)

The unit of intensity of sound:

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Wm^-1

Wm^-2

Wm

Wm²

The half of carbon 14 is

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5720 years

5730 years

5740 years

5750 years

Release of the energy by the sun is due to:

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Nuclear Fussion

Nuclear Fission

Burning of gases

Chemical reaction

A dielectric must be:

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Resistor

Insulator

Good conductor

Semi conductor

Which process is involved to store charge in capacitors:

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Rubbing

Electrostatic induction

Conduction

Electromagnetic induction

Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly ………. To the wavelength of the wave:

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Two times

Equal

Four times

Half

The speed of sound was accurately measured in:

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1736

1737

1738

1739

CD which is made of soft material is called:

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Hard disk

Floppy disk

Iron disk

Copper disk

The half life of argon nuclide Ar-40 is:

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2 x 10⁸years

2 .2x 10⁸years

2.4x 10⁸years

2.8x 10⁸years

The cathode ray oscilloscope consists of main parts:

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Two

Three

Four

Five

Joule's law is W = ____________________

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IR/t

IRt²

IR²t

I²Rt

The distance of the object from the mirror is represented by :

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q

p

m

F

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