- #1
VitaminK
- 46
- 4
- Homework Statement
- Find the expression for Power in a Circuit with two light bulbs ( each with resistance R) in series. The terminal voltage is V.
- Relevant Equations
- Req= R1+ R2
P=V^2/R
I was wondering if someone could check my answer and see if it is correct.
The resistance in series is Req= R+ R= 2R
The voltage across 2R is the terminal voltage V. The expression I get is:
Can I also use this formula P=I^2*R?
When using it I get:
Current through the resistors is
The resistance in series is Req= R+ R= 2R
The Power is:
However i don't get the same answer :(
The resistance in series is Req= R+ R= 2R
The voltage across 2R is the terminal voltage V. The expression I get is:
Can I also use this formula P=I^2*R?
When using it I get:
Current through the resistors is
The resistance in series is Req= R+ R= 2R
The Power is:
However i don't get the same answer :(