Question # 1

The speed of sound was accurately measured in:

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1736

1737

1738

1739

The frequency of silent whistle is:

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20,000 Hz – 25000Hz

2000 Hz – 2500Hz

200 KHz – 2000 Hz

25000 KHz

Field around a charge in which that charge exerts a force on a point charge brought in that field is called:

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Electric field

Magnetic field

Neutral zone

Point charge

NOT gate is also called:

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Converter

Inverter

Transmitter

Receiver

Ultrasound waves carry energy:

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Less

More

Equal

None of these

Two charged spheres are separated by 2 mm. Which of the following would produced the greatest attractive force?

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+1 q and +4q

-1 q and -4q

+2 q and +2q

+2 q and -2q

If a charged body is brought near a negatively charged electroscope and the leaves of electroscope diverge, then the body is:

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Positively charged

Negatively charged

Neutral

None of these

1 bel=

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0.1 dB

10 dB

100 dB

0.01 dB

1 Pico Farad is equal to:

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10^-9F

10^-12F

10¹²F

10^-6F

Old people cannot hear sound above than:

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1000 Hz

15000 Hz

20000 Hz

Safe level of noise depends on factors:

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One

Two

Three

Four

The unit of intensity of sound:

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Wm^-1

Wm^-2

Wm

Wm²

Electric potential is a quantity:

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Scalar

Vector

Base

All

The unit of electrical energy is:

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Joule

Watt

Volt

Electron volt

Bats can hear sound of frequency up to:

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100,000Hz

25000Hz

120, 000Hz

1000Hz

Capacitance is defined as:

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VC

Q/V

QV

V/Q

In computer terminology information means:

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Any data

Raw data

Processed data

Large data

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral charge

Repels a neutral chage

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

The electrostatic force acting on two charges each of 1 C separated by 1m is about .

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9 x 10⁹ N

9 x 10^-9N

9 x 10⁸N

9 x 10^-8N

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

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