Question

In the SI system, the unit of P.E. is

• A. erg
• B. dyne-cm
• C. joule
• D. none of these

Answer 1

The correct option is C

joule

The explanation for correct option:

The correct option is C. joule

1. Potential energy (P.E.) is the energy possessed by a body by virtue of its position above the ground level.
2. The SI unit of potential energy is the joule (J).

The explanation for incorrect options:

A. erg

The C.G.S unit of potential energy is erg.

B. dyne-cm

In the C.G.S system, the unit of potential energy is dyne-cm which is equivalent to one erg.

D. none of these

Joule is the S.I. unit of potential energy.

Thus, in the S.I. system, the unit of P.E. is the joule.