Question

Calculate the resistance of the circuit and the amperage through all the resistors.


R = 2 Ω, R1 = 2 Ω, R2 = 4 Ω, R3 = 4 Ω, U2 = 2 V.




Choose one:


a.

R = 10 Ω; I = 5 A; I1 = 2 A, I2 = I3 = 1.5 A.



b.

R = 3 Ω; I = 1,5 A; I1 = 1 A, I2 = I3 = 0,5 A.



c.

R = 3 Ω; I = 2 A; I1 = 1 A, I2 = I3 = 0,5 A.

Answer 1

Answer: C

Explanation:

Resistors R1, R2 and R3 are in  parallel so

1/R1 + 1/R2 + 1/R3 = 1 ohm

adding Resistor 'R' make it 2ohm + 1 ohm = 3 ohm

Whereas for current use formula I = V/R