Question # 1

Intensity level of the sound produced by mosquito buzzing is:

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70 dB

40 dB

10 dB

120 dB

Electric field lines of force were first introduced by:

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Ampere

Farady

Fleming

Coulomb

The speed of sound was accurately measured in:

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1736

1737

1738

1739

Which frequency is used by elephants to communicate with each other:

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Zero frequency

Low frequency

Medium frequency

High frequency

In the presence of a charged body, an insulated conductor develops positive charge at one end and negative charge at the other end, this i- called:

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Electrostatics

Electrostatic induction

Magnetism

Electromagnetic induction

Bats can hear sound of frequency up to:

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100,000Hz

25000Hz

120, 000Hz

1000Hz

1 bel=

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0.1 dB

10 dB

100 dB

0.01 dB

Which is used to investigate the properties of electron beam:

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LDR

Electroscope

Proton gun

Electron gun

The S.I unit of electric potential is:

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Watt

Joule

Coulomb

Volt

Sound waves having frequency higher than 20,000 Hz are called:

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Ultrasonic

Infrasonic

Audible

Echo

Safe level of noise depends on factors:

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One

Two

Three

Four

Mathematical formula of capacitance of a capacitor is:

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C = QV

C = Q/V

C = V/Q

C = V2/Q

Coulomb's law is mathematically stated as:

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F = k q1 q2/r3

F = k q2 q2 / r2

F = k q1 q2 / r

F = k q1 q2 / r2

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Physics 10th Class English Medium Unit 4 Online Test MCQs With Answers

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