# Current Dividing in an Electrical Circuit

Member advised to use the formatting template for all homework help requests
A circuit contains a 7.5V d.c power supply and three resistors. The total resistance of the circuit is 30 ohms. Why will the largest current in the 18 ohm resistor? As far as I know is that the smallest current will be in 60 ohm resistor because it has the maximum resistance. Please explain.
Thanks.
(regards)

#### Attachments

2.1 KB · Views: 366

## Answers and Replies

Homework Helper
Hi,

I don't see a contradiction in your statements: All the current that the supply delivers to the circuit will have to go through the 18 ##\Omega## resistor. And yes, the 60 ##\Omega## resistor will have a smaller amount of current than the 15 ##\Omega## resistor.

Hi,

I don't see a contradiction in your statements: All the current that the supply delivers to the circuit will have to go through the 18 ##\Omega## resistor. And yes, the 60 ##\Omega## resistor will have a smaller amount of current than the 15 ##\Omega## resistor.
Why won't the largest amount of current pass through 15 ohm resistor? Because lower the resistance, higher will be the current..

Homework Helper
Current flows from high potential (voltage) -- the + of the power supply -- to low potential -- the ##-## of the power supply. On its path it has to go through resistor 18 ##\Omega## and after that it can and will branch over the other two. From the power supply + to the other end of the 18 ##\Omega## resistor there is a potential drop.

The left sides of the 60 ##\Omega## and the 15 ##\Omega## resistors are connected by a wire. So are the right sides.
In other words: the potential difference over the 60 ##\Omega## and the 15 ##\Omega## resistors is the same.