Each of three resistors in fig. `7.12` has a resistance of `2 Omega` and can dissipate a maximum of `18 W` without becoming excessively heated. Find the maximum power the circuit can dissipate.

Explanation

`P_(max) = (i_(max))^(2) R or 18 = i_(max)^(2) xx 2 or i_(max) = 3 A`
Here ` R_(eq) = 3 Omega`.