Contemporary Electronics Fundamentals, Devices, Circuits, and Systems 1st Edition by Louis Frenzel

تمرين 1

In Fig. 9-24, an 8- heater is connected to the120-Vac power line by two 50-ft lengths of copper wire. If each 50-ft length of wire has a resistance of0.08 V, then calculate the following:
a. The total length of copper wire that connects the 8- heater to the 120-Vac power line.
b. The total resistance, R T , of the circuit.
c. The current, I , in the circuit.
d. The voltage drop across each 50-ft length of copper wire.
e. The voltage across the 8- heater.
f. The I 2 R power loss in each 50-ft length of copper wire.
g. The power dissipated by the 8- heater.
h. The total power, P T , supplied to the circuit by the120- ac power line.
i. The percentage of the total power, P T , dissipated by the 8- heater.