Problema Solution
The current in a circuit varies inversely as the resistance. The current is 20 amperes when the resistance is 7 ohms. Find the current for resistance of 20 ohms.
The current is ____amperes.
Answer provided by our tutors
Let I be the current and R be the resistance
Since the current varies inversely as the resistance,
I = C/R, where C is a constant.
=> IR = C
=> I1 * R1 = I2 * R2
=> 20 * 7 = I2 * 20
=> I2 = 7 amperes.
So the current is 7 amperes.