Electric Circuits Answers

A 1270-kg car is being driven up a 7.73 ° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of 524 N. A force F is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act on the car: its weight W and the normal force FN directed perpendicular to the road surface. The length of the road up the hill is 247 m. What should be the magnitude of F, so that the net work done by all the forces acting on the car is 164 kJ?

The capacitors C1 = 3.00 µF, C2 = 6.00 µF and C3 = 4.00 µF are fully charged; the capacitor C2 has a plate charge of 18.0 µC. What is the voltage across the capacitor C3?

Find an expression for the energy density in terms of stress and strain

1. An 8.00 × 106 kg electromagnet built in Switzerland draws a current of

3.00 × 102A. How much charge passes through the magnet in 2.4 min?

A transverse traveling wave on a taut wire has an amplitude of 0.200 mm and a frequency of 540 Hz. It travels with a speed of 196 m/s.
(a) If the wave equation is written in the form y = A sin(kx - ωt), what are the parameters A, k, and ω?

_________ m
_______ rad/m
_______ rad/s

(b) The mass per unit length of this wire is 3.90 g/m. Find the tension in the wire.
________ N

A current flows through a resistance R=10 Ohm what is the expression for instantaneous voltage across the resistance when a) i=5sin314t b) i=10sin(1570-45')