Question

Which does not have the same unit as others?

• A. Watt-sec
• B. Kilowatt-hour
• C. eV
• D. Angle

Answer 1

The correct option is D

Angle

The explanation for the correct options:

Unit: Standard reference for measurement of any physical quantity.

Option D is the correct answer. i.e., Angle

Radian: Unit of measurement for angles and it is defined as the ratio of the arc length to the radius of the circle. Its symbol of the unit is deg or $°$ (degree).

For radian, the formula is as:

$\mathrm{Algle}\left(\mathrm{\theta }\right)=\frac{\mathrm{Arc}\mathrm{length}\left(\mathrm{s}\right)}{\mathrm{Radius}\left(\mathrm{r}\right)}$

Thus, Radians are the SI unit for angles

The explanation for the incorrect options:

Watt-sec, kiloWatt-hour, and eV are all units of energy

Hence, option (D) is correct.