Questions LLC
Login
or
Sign Up
Ask a New Question
Science and Technology
Physics
Electrical Circuits
When you know the wattage and applied voltage of a light bulb, determine its resistance
1 answer
p = V i
but i = V/r
so
p = V^2/R
and thus
R = V^2/p
You can
ask a new question
or
answer this question
.
Related Questions
The voltage,V, in an electrical unit is related to the current,I, and the resistance,R, by the equation V=IR. The current is
A simple electric circuit has the following properties:
resistance: 12 ohms voltage: 96 V Which circuit below has the same
There are two light bulbs in a circuit, wired in parallel. A third light bulb is added again in parallel. What is the effect on
Explain whether the photons emitted by a bright light bulb are more energetic than those emitted by a dim light bulb of the same
the voltage, v, in volts, applied to an electric circuit can be modelled by the equation v=167sin(120pi)(t), where t is the
3. The voltage, V, in volts, applied to an electric circuit can be modelled by the equation V=150cos(120πt) where t is time,
Eight holiday lights are connected in parallel as shown in Fig.
3. a. If the set is connected to a 120 V source, what is the
Three light bulbs are connected in a series, as shown in the diagram.After the circuit is completed, the middle light bulb
a 75w and 50 w incandescent light bulbs are designed fot use with the same voltage. what is the ratio of the resistance of the
The wattage rating of an appliance W varies jointly as the square of the current I and the resistance R. If the wattage is 1.5
