SOLUTION: Jack measured 1 amp as the total current in a certain circuit when he applied 20 volts to the circuit. When he applied 60 volts, he got a measurement of 3 amps. Write a linear equa

Algebra ->  Linear-equations -> SOLUTION: Jack measured 1 amp as the total current in a certain circuit when he applied 20 volts to the circuit. When he applied 60 volts, he got a measurement of 3 amps. Write a linear equa      Log On


   

Question 418347: Jack measured 1 amp as the total current in a certain circuit when he applied 20 volts to the circuit. When he applied 60 volts, he got a measurement of 3 amps. Write a linear equation describing the relation between voltage and current, and calculate the total current when 50 volts are applied to the circuit.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Jack measured 1 amp as the total current in a certain circuit when he applied 20 volts to the circuit.
Find the resistance of the circuit
R = E%2FI
R = 20%2F1
R = 20 ohms is the resistance of the circuit
:
When he applied 60 volts, he got a measurement of 3 amps.
I = E%2FR
I = 60%2F20
I = 3 amps
:
Write a linear equation describing the relation between voltage and current
I = E%2F20
:
Calculate the total current when 50 volts are applied to the circuit.
I = 50%2F20
I = 2.5 amps