Physics Units Challenge: SI, Derived Measures, and Conversions

Question 1

Which SI derived unit is equivalent to kg·m²/s³?

Accepted Answer

Watt

Answer

Pascal

Answer

Joule

Answer

Tesla

Question 2

Which physical quantity is measured in tesla?

Accepted Answer

Magnetic flux density

Answer

Electric resistance

Answer

Luminous intensity

Answer

Dynamic viscosity

Question 3

The SI unit hertz can be expressed in base units as s⁻¹.

Accepted Answer

True

Answer

False

Answer

Only in acoustics

Answer

Only for angular frequency

Question 4

A pressure of 1 pascal is equal to which combination of units?

Accepted Answer

1 N/m²

Answer

1 N·m

Answer

1 J/s

Answer

1 kg·m/s

Question 5

Which pair correctly matches a unit with the quantity it measures?

Accepted Answer

Coulomb — electric charge

Answer

Weber — electric current

Answer

Siemens — capacitance

Answer

Farad — inductance

Question 6

Which SI prefix corresponds to a factor of 10⁻⁹?

Accepted Answer

Nano

Answer

Micro

Answer

Pico

Answer

Milli

Question 7

In radiation physics, which unit measures absorbed dose rather than dose equivalent?

Accepted Answer

Gray

Answer

Sievert

Answer

Becquerel

Answer

Curie

Question 8

Which statement about electronvolts is correct?

Accepted Answer

It is a unit of energy commonly used in atomic and particle physics

Answer

It is an SI base unit of charge

Answer

It measures electric potential difference only

Answer

It is equal to one joule exactly

Question 9

If a car travels at a steady 72 km/h, what is its speed in metres per second?

Accepted Answer

20 m/s

Answer

18 m/s

Answer

22 m/s

Answer

24 m/s

Question 10

Which unit is named after the scientist associated with the study of frequency and electromagnetic waves?

Accepted Answer

Hertz

Answer

Newton

Answer

Kelvin

Answer

Ampere

Physics Units Challenge: SI, Derived Measures, and Conversions

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