Question

If the current passing through the 3 ohm resistor is 2A, what is the potensial difference between points K and L?

Answer 1

Answer:

18 V

Explanation:

The 3Ω resistor and the 6Ω resistor are in parallel, so the voltage difference across them is equal.

V = IR

V = (2 A) (3 Ω)

V = 6 V

So the current going through the 6Ω resistor is:

V = IR

6 V = I (6 Ω)

I = 1 A

Therefore, the current going through the 4Ω resistor is the sum:

I = 2 A + 1 A

I = 3 A

The voltage drop across the 4Ω resistor is:

V = IR

V = (3 A) (4 Ω)

V = 12 V

So the total voltage difference between K and L is:

V = 6 V + 12 V

V = 18 V