Friday

February 27, 2015

February 27, 2015

Posted by **Priscilla** on Friday, February 26, 2010 at 6:39pm.

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

---- Ok, i understand some of this. For the six lamps turned on is 0.5 A. For the four lamps turned on, would i divide 240/4 = 60 and then find the current.

- Thanks a lot and have a good weekend.

- Physics -
**bobpursley**, Friday, February 26, 2010 at 7:32pmyes, dont forget about the heater, it draws 10 amps when on.

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