Answer:
12V
Explanation:
Given parameters:
Resistance = 12ohms
Heat released = 144J
Time taken = 12s
Unknown:
Voltage at the ends of the conductors = ?
Solution:
To solve this problem, we must first determine the power expended by the circuit.
Power is the rate at which work is done;
P = [tex]\frac{work done }{time}[/tex]
= [tex]\frac{144}{12}[/tex]
= 12W
Electrical power is given as;
P = IV = [tex]\frac{V^{2} }{R}[/tex]
Since V is the unknown, we solve for it;
12 = [tex]\frac{V^{2} }{12}[/tex]
V = 12V
