Posted by **Priscilla ** on Friday, February 26, 2010 at 8:00am.

A circuit contains sic 60-W lamps with a resistance of 240-ohm each and a 10.0-ohm heater connected in parallel. The voltage across the circuit is 120 V. Find the current in the circuit for the following situations::::

a. four lamps are turned on

b. all of the lamps are turned on

c. six lamps and the heater are operating.

- Physics -
**drwls**, Friday, February 26, 2010 at 8:11am
In each case, add the currents of all of the operating lamps and heater.

For the lamps, the current drawn by each ont that is "on" is I = V/R

= 120/ 240 = 0.5 A

For the heater, the current drawn is 120/10 = 12 A

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