Question # 1

the resistance of an ammeter should be:

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high

very high

low

constant

Which is not a hardware device?

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CPU

Windows

Keyboard

Mouse

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

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Telescope

Microscope

Periscope

Prism

When we heat the metal at high temperature they emit:

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Holes

Protons

Neutrons

Electrons

earth wire is connected with those appliances whose casing is made of:

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metals

wood

glass

plastic

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)

Human skin, in dry conditions, has a resistance of:

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20,000 ohm

100,000 ohm

30,000 ohm

2000 ohm

A 3Ω resistor having 2A current will dissipate the power of:

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12W

4W

6W

8W

The distance between two consecutive compressions or rarefactions in longitudinal waves is called:

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Amplitude

Wavelength

Half wavelength

1/4 wavelength

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

The power of small fan is:

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40 W

50 W

60 W

80 W

According to Fleming's left hand rule the direction of force on the conductor is given by:

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Thumb

Fore finger

Middle finger

None of these

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Lens

Mirror

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