Question

The ratio of SI units to CGS units of energy is

• A. 10${}^5$
• B. 10${}^6$
• C. 10${}^7$
• D. 10${}^{-7}$

Answer 1

The correct option is C 10${}^7$

Unit of energy is $M{L}^2{T}^{-2}$

So in $CGS$ unit, mass = gram, length = centimeter, time = second.

And in $SI$ unit, mass = kilo gram, length = meter ,time = second.

So ratio of both SI to CGS

=$\frac{kg.m^2.s^{-2}}{g.c{m}^2.s^{-2}}$

=$\frac{1000g{.100}^{2}c{m}^2.s^{-2}}{g.c{m}^2{s}^{-2}}$

=${10}^7$.