The equivalent resistance of parallel resistors,
The equivalent resistance of the bulbs,
Req = 1.5 Ω
R and Req are in series.
RR,Req = 1.5 + R
Two bulbs are connected in parallel across a source of emf ℰ = 11.0 V with a negligible internal resistance. One bulb has a resistance of 3.0 Ω , and the other is 3.0 Ω . A resistor R is connected in the circuit in series with the two bulbs. What value of R should be chosen in order to supply each bulb with a voltage of 2.4 V ?
For what value of R would the potential difference across each of the bulbs be 2.4 V ? Express your answer in ohms using three significant figures.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Solving Resistor Circuits concept. You can view video lessons to learn Solving Resistor Circuits. Or if you need more Solving Resistor Circuits practice, you can also practice Solving Resistor Circuits practice problems.