Find the constant of proportionality for the stated conditions: $E$ varies jointly with $I$ and $R$, and when $E$ $= 2,520 , R = 40$ and $\mathrm { I } = 7$.
A) $\quad k = 7$
B) $k = 9$
C) $\quad k = - 9$
D) $\quad k = - 2,520$
E) $\quad k = 2,520$

Question

Quizplus · Accepted Answer

The equation for joint variation is $E = kIR$. Substituting the given values, $2520 = k \times 7 \times 40$. Solving for $k$, we get $k = 9$.

Find the Constant of Proportionality for the Stated Conditions EEE Varies Jointly With

Find the Constant of Proportionality for the Stated Conditions $E$ Varies Jointly With