A potential difference of 12.0V is maintained across an electrical device with a resistance of 10.0Ω. What total charge passes through a cross section of wire attached to this device over a period of 4.00s?
A metal wire has a resistance of 8.00Ω at a temperature of 20C. If the same wire has a resistance of 8.40Ω at 70C, what is the resistance of this wire in ohms when its temperature is −10C?
q=It=Ut/R
I find 4.8C but it's wrong!
To determine the total charge passing through the wire attached to the device, you need to use the formula:
Q = V * t
Where:
Q = total charge (in Coulombs)
V = potential difference (in Volts)
t = time (in seconds)
In this case, the potential difference (V) is 12.0V, and the time (t) is 4.00s.
Substituting the values into the formula:
Q = 12.0V * 4.00s
Q = 48 Coulombs
Therefore, the total charge passing through the cross section of wire attached to the device over a period of 4.00s is 48 Coulombs.