Question # 1

What is the voltage across a 6Ω resistor when 3 A of current passes through it?

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2 V

9 V

18 V

36 V

The resistance of voltmeter is:

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zero

low

Very high

10Ω

Volt is named after the Italian physicist:

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Faraday

Alessandro volta

Newton

Coulomb

Those quantities whose values change gradually or stay constant are called:

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Physical quantities

Digital quantities

Log quantities

Analog quantities

Astronauts in space need to communicate with each other by radio links because:

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Sound waves travel very slowly in space

Sound waves travel very fast in space

Sound waves cannot travel in space

Sound waves have low frequency in space

The waves, which are used to detect the broken bones are called:

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Light waves

x-rays

sound waves

both b and c

After refraction from a convex lens, rays of light parallel to the principal axis converge at a point, this point of convex lens is called:

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Principal focus

Pole

Focal length

Optical center

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2 Ω

4 Ω

8 Ω

12 Ω

The instrument used to study the properties of waves is called:

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Ripple tank

Stroboscope

Pendulum

None of these

A group of instructions or a program which guides hardware to do work is called:

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Hardware

Micro processor

Memory

Software

Totally reflecting prism is used in:

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Periscope

Binoculars

Periscope and binocular

Telescope

Image formed on a camera is:

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real,invertred, and diminished

virtual, upright and diminshed

virtual, upright and magnified

real, inverted and magnified

If focal length of a lens is 1m, then its power will be:

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1 D

0.5 D

1.5 D

1 D

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