Power in circuits:
Given that 3.9 W of power is to be dissipated, we'll consider the equation:
P = V2/R
V = sqrt(PR) = sqrt[(3.9)(0.33)] = 1.134V
A 9.0-cm-long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total resistance of the wire and rail is 0.33 Ohms. Pulling the wire with a force of 1.2 N causes 3.9 W of power to be dissipated in the circuit. What is the speed of the wire when pulled with 1.2 N?
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 Magnetic Field Produced by Straight Currents concept. You can view video lessons to learn Magnetic Field Produced by Straight Currents. Or if you need more Magnetic Field Produced by Straight Currents practice, you can also practice Magnetic Field Produced by Straight Currents practice problems.