Question

a circuit contains two devices that are connected in parallel if the resistance of one of these devices is 12 ohms and the resistance of the other devices for 4 ohmss the total resistance of the two devices is

Answer 1

3 ohms i pass the test with this being the correct one

Answer 2

Total resistance, R' = 3 ohms

Step-by-step explanation:

It is given that, a circuit contains two devices that are connected in parallel. There values are given as :

Resistor 1,
`R_1=12\ \Omega`

Resistor 2,
`R_2=4\ \Omega`

The total resistance in parallel combination is given by :

`(1)/(R')=(1)/(R_1)+(1)/(R_2)`

`(1)/(R')=(1)/(12)+(1)/(4)`

R' = 3 ohms

So, the total resistance of the two devices is 3 ohms. Hence, this is the required solution.