What is the resistance of R3 and the current of the circuit if this is series?

Question

The voltage provided by the battery is 100 V and the resistance of R1 is 20 Ω, the resistance of R2 is 60 Ω, and the voltage drop across R1 is 10 V.

Answer 1

Hiyori

In a series circuit the current I is constant, and related to the resistance by.

V = I (R₁ + R₂ + R₃) (AN EXTENSION OF Ohm's Law, V=IR).

Considering R1 you can find the current I using V=IR, you know V (10) and R (20).

Then knowing I you can find R₃ using the equation above.

_Mike