Sunday
September 21, 2014

Homework Help: Physics

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

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

---- 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.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - A circuit contains sic 60-W lamps with a resistance of 240-ohm each ...
Physics - A circuit contains six 270 lamps and a 18.0 heater connected in ...
physics. - resistors of 30 ohms and 60 ohms are connected in parallel and joined...
Physics - A 22-ohm resistor and a 33-ohm resistor are connected in series and ...
physics - resistors of 30 ohms and 60 ohms are connected in parallel and joined...
physics - resistors of 30 ohms and 60 ohms are connected in parallel and joined...
physics - Please check my work here: Resistors of 30 ohms and 60 ohms are ...
physics - need help - Resistors of 30 ohms and 60 ohms are connected in parallel...
physix - three resistances of value 1 ohm, 2 ohm and 3 ohm are connected in ...
Physics - I have a question about resistors...Wouldn't a 40-ohm resistor be the ...

Search
Members