Question

A 10 ohm a 15 ohm and a 20 ohm resistor are connected in series across a 9v supply what Current flows

Answer 1

I = 0.2 A

Step-by-step explanation:

The current flowing across each resistor in a series arrangement is the same throughout the circuit. So in order to calculate the current, we must first find the equivalent resistance of all three resistors. The equivalent resistance of the resistors connected in series is given as:

`R = R_(1) + R_(2) + R_(3)\\R = 10\ ohm + 15\ ohm + 20\ ohm \\R = 45\ ohm`

Now we use Ohm's law for the current:

`V = IR\\\\I = (V)/(R)\\\\I = (9 volts)/(45\ ohms)\\`

I = 0.2 A