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Physics Trivia Trivia Quiz

Some questions to test your knowledge of physics.

A multiple-choice quiz by Sohaib. Estimated time: 5 mins.

Author
Sohaib

Time
5 mins

Type
Multiple Choice

Quiz #
177,654

Updated
Dec 03 21

# Qns
10

Difficulty
Tough

Avg Score
5 / 10

Plays
6538

Last 3 plays: Guest 175 (4/10), Guest 73 (4/10), Guest 93 (4/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. Which of the following is a scalar quantity? Hint

the braking force needed to stop a car

the heat needed to boil some water

the effort needed to hammer a nail into wood

the thrust needed to lift a rocket off the ground

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Question 2 of 10

2. The electromotive force induced in a conductor moving at right angles to a magnetic field does not depend upon Hint

the strength of the magnetic field

the length of the conductor

the resistance of the conductor

the speed of the conductor

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Question 3 of 10

3. In which of the following is a force of friction necessary? Hint

when a ball is bouncing off a wall

when a car is accelerating on a road

when a drum skin is vibrating

when a rocket is taking off

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Question 4 of 10

4. The half-life of isotope X is four days and its initial mass is 32mg.
What mass of isotope X will remain after 12 days? Hint

8 mg

16 mg

12 mg

4 mg

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Question 5 of 10

5. What is emitted by the hot metal filament in the cathode ray tube? Hint

electrons

protons

a-particles

X-rays

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Question 6 of 10

6. What is the current in a 5.0 ohm resistor when the potential difference between the ends of the resistor is 2.5 V? Hint

12.5 A

2.0 A

0.50 A

2.5 A

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Question 7 of 10

7. Which fuse should be used for a 750 W electric iron connected to a 240 V supply? Hint

13 A

3 A

5 A

10 A

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Question 8 of 10

8. On what does the quality (timbre) of a sound wave depend? Hint

The frequency of the wave

The size of the wave

The shape of the wave

The speed of the wave

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Question 9 of 10

9. Watt-second can be used as a unit of energy.

Yes

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Question 10 of 10

10. An electric lamp uses energy at the rate of 48 W on a 12 V supply.

How much charge passes through the lamp in 2.0 seconds? Hint

8 coulombs

48 coulombs

4 amperes

8 amperes

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Most Recent Scores

Oct 27 2024 : Guest 175: 4/10
Oct 24 2024 : Guest 73: 4/10
Oct 24 2024 : Guest 93: 4/10

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Quiz Answer Key and Fun Facts

1. Which of the following is a scalar quantity?

Answer: the heat needed to boil some water

The braking force needed to stop a car, the effort needed to hammer a nail into wood and the thrust needed to lift a rocket off the ground are examples of forces which are vectors.

2. The electromotive force induced in a conductor moving at right angles to a magnetic field does not depend upon

Answer: the resistance of the conductor

The resistance of the conductor affects its induced current and not its induced e.m.f.

3. In which of the following is a force of friction necessary?

Answer: when a car is accelerating on a road

The force causing a car to accelerate comes from a frictional force between the wheels and the road.

4. The half-life of isotope X is four days and its initial mass is 32mg. What mass of isotope X will remain after 12 days?

Answer: 4 mg

12 days = 12/4 = 3 half-lifes.

Hence mass = [(1/2)(to the power 3)] X (32)
= 4 mg

5. What is emitted by the hot metal filament in the cathode ray tube?

Answer: electrons

The metal filament emits electrons via thermionic emission.

6. What is the current in a 5.0 ohm resistor when the potential difference between the ends of the resistor is 2.5 V?

Answer: 0.50 A

I = V/R
I = 2.5/5.0
I = 0.50 A

7. Which fuse should be used for a 750 W electric iron connected to a 240 V supply?

Answer: 5 A

The normal operating current = P/V = 750/240 = 3.13 A

The fuse rating of the appropriate fuse must be higher but as close as possible to the normal operating current.

8. On what does the quality (timbre) of a sound wave depend?

Answer: The shape of the wave

The quality of a sound wave depends on the combination of overtones which affect the shape of the sound wave.

9. Watt-second can be used as a unit of energy.

Answer: Yes

Unit of power = watt
Unit of time = second

Using Energy = Power x time
joule = watt second.

10. An electric lamp uses energy at the rate of 48 W on a 12 V supply. How much charge passes through the lamp in 2.0 seconds?

Answer: 8 coulombs

I = P/V = 48/12 = 4.0 A

Q = It = (4.0)(2.0) = 8.0 C

C = coulomb ( the unit of charge).

Source: Author Sohaib

This quiz was reviewed by FunTrivia editor crisw before going online.
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