Question 1184197
The electrical current, in amperes, in a circuit varies directly as the voltage.
When 15 volts are applied, the current is 5 amperes.
:
The basic formulas; E is volts, I is current, R is resistance
E = I * R
I = E/R
R = E/I
find the resistance of the circuit
R = 15/5
R = 3 ohms :
:
 What is the current when 18 volts are applied?
I = E/R
I = 18/3
I = 6 amps