A battery has an internal resistance of 40 Which of the fol

A battery has an internal resistance of 4.0 . Which of the following load resistors would have the most power delivered to it when connected across the battery?

Please explain a. 1.4 b. 2.0 c. 4.0 d. 8.0 e. 16

Solution

in order to obtain max power. the current drawn through circuit is max

=> I = E/(R+r)

R should be min = 1.4 ohm