a) Calculate the current in resistor R2

Step one: calculate total resistance of R1 and R2 in order to turn the circuit into a series.

In order to find total resistance you do:

1/R1 + 1/R2 = 1/R12

¼ + 1/6= 1/R12

0.25 +0.17 = 0.417 (0.42)

1/0.42 =2.38 =2.4Ohms

R12= 2.4

Step two: now you have the total resistance through R1 and R2 you have to find the total

resistance of the circuit, by adding R12 and R3 together

R12 + R3 =TR

2.4 + 9.6= 12 Ohms

Step 3- to find the current in the circuit you need to divide the voltage by Resistance

V /R = I

36 / 12 = 3A

Step 4- you then need to find the voltage going through R12.

V= I X R12

V= 3 x 2.4

V= 7.2 V

Step 5- to calculate the current of resistor 2 you have to use the information we have found above and put the figures into the equation I= V / R

7.2 / 6 =1.2A

So current in resistor 2 is 1.2A

	Created by emily5865 about 8 years ago

4 Electrical questions Slide Set on Question two Electrical, created by emily5865 on 09/05/2016.