A.) Three resistors, 27, 49, and 79 ?, are connected in series, and a 0.51-A current passes through them.
(a) What is the equivalent resistance?
?
(b) What is the potential difference across the three resistors?
V
B) A 50.0-W lamp is placed in series with a resistor and a 120.0-V source. If the voltage across the lamp is 26 V, what is the resistance R of the resistor?