Homework Help: Physics

Posted by Maria on Thursday, April 28, 2011 at 1:28am.

A 37 ohm lamp and a 59 ohm lamp are connected in series and placed across a potential of 43 V.
What is the equivalent resistance of the
circuit? Answer in units of ohm.

What is the current in the circuit?
Answer in units of A.

What is the voltage drop across the first
lamp?
Answer in units of V.

What is the power dissipated in the first
lamp?
Answer in units of W.

Physics - drwls, Thursday, April 28, 2011 at 1:33am
Resistors in series add. Equivalent resistance is 37 + 59 = 96 ohms.

Use ohm's law to get the current that goes through through both resistors.

The first resistor gets 37/96 of the 43 V applied voltage. The second resistor gets the rest.

resistor power dissipation = I^2 R
Physics - Maria, Thursday, April 28, 2011 at 1:51am
I got the answer wrong. Is there any other ways you can explain this?
Physics - drwls, Thursday, April 28, 2011 at 5:01am
Show us your work and someone will show you where you may have made mistakes
Physics - mohamed, Saturday, September 1, 2012 at 12:04pm
a =f/m

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