Answer to Question #135938 in Electric Circuits for Samuel ak

Question

2 resistors of 4 ohms and 5 ohms in parallel are connected to the terminal of a battery consisting of 4 dry cells each having an electronic motive force of is in series if the current supplied is 2.5 Ampere calculate the effective external resistance

Answer 1

given 4 dry cell in series, so potential will be equal to 6v

now current drawn is 2.5 A, hence from Ohm's law... V= IR .

=> $6=2.5r , => r= 6/2.5 = 2.4 ohm$

effective external resistance = 2.4 Ohms