Question # 1

The focal length is related to radius of curvature by the formula:

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f = 2R

f = 4R

f = R/2

R = f/2

The ampere is a unit of:

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Energy

Potential differrence

Electric potential

Electric current

Which is the best material for making connecting wires:

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Iron

Copper

Tungsten

Nickel

Electric potential is a quantity:

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Scalar

Vector

Base

All

Which is the most suitable means of reliable continuous communication between an orbiting satellite and Earth?

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Microwaves

Radio waves

Sound wave

any light waves

Which element is used for the monitoring of thyroid glands?

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Iodine- 131

Phosphorus-32

Carbon-14

Potassium-40

The relation between v,f andλ of a wave is:

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vf=λ

fλ = v

vλ =f

v=λ/f

If the distance between two point charges is reduced to half, the coulomb’s force become:

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Half

Two times

One fourth

Fourth times

What does a switch do:

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Oppose the current

Open and close the circuit

Store energy

Provide voltage

The example of shock absorber of the vehicles are:

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Simple harmonic motion

Vibratory motion

Damped motion

Linear motion

Wave equation is defined as:

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f = Tλ

f = V λ

V = 2fλ

V = fλ

To see from submarine the ship at the surface of water , we use:

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Telescope

Microscope

Peri scope

Prism

The 1st practical electric battery is known as:

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Voltaic

Pile

Voltaic pile

Voltaic cell

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