Asked by Billy
A circuit contains six 270 lamps and a 18.0 heater connected in parallel. The voltage across the circuit is 120 V.
(a) What is the current in the circuit when four lamps are turned on?
(b) What is the current in the circuit when all lamps are on?
(c) What is the current in the circuit when six lamps and the heater are operating?
(a) What is the current in the circuit when four lamps are turned on?
(b) What is the current in the circuit when all lamps are on?
(c) What is the current in the circuit when six lamps and the heater are operating?
Answers
Answered by
Henry
R(Lp) = 270 Ohms each?
R(Htr) = 18 Ohms?
a. I = 4 * (120/270) = 1.78A.
b. I = 6 * (120/270) = 2.67A.
c. I = 2.67 + (120/18) = 9.34A
.
R(Htr) = 18 Ohms?
a. I = 4 * (120/270) = 1.78A.
b. I = 6 * (120/270) = 2.67A.
c. I = 2.67 + (120/18) = 9.34A
.
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