Question

A series circuit contains two devices, one with a resistance of 10 ohms and one with a resistance of 4 ohms. If the generator supplies a voltage of 42 V, what is the magnitude of the current?

Answer 1

Total resistance = 10 + 4 = 14 ohms = 14Ω

Current = V/R

Current I = 42V / 14Ω = 3 Amperes.

Answer 2

-- The net effective resistance of 10-ohms and 4-ohms
in series is 14 ohms.

-- The current in the series loop is I = E/R = 42V/14-ohms = 3 amperes.