1. The two springs in the figure below each have a spring constant of 10 N/m. They are compressed by 1.0 cm when a current passes through the wire. How big is the current? 20 cm B-05T

3. Four long wires are parallel to each other, their cross section forming a square 20 cm on edge, as shown in Figure 1 below. A 20 amp current is set up in each wire. What is the force per meter acting on the lower left wire, in magnitude and direction? represents current flowing through wire in the direction out of the paper, direction into the paper. represents current flowing through wire in the a a a Figure. 1

Two straight parallel wires are separated by 7.5 cm. There is a 2.0-A current flowing in the first wire.

10.8 cm, v = 4.86 m/s, and B = the resistance of the rails is neglibly small and the resistance of the rod is R = 415 mN, what is the magnitude of the current 3. Assume that L 1.18 T. If in the circuit? в А. О.50 A В. 1.0 А С. 1.5 А D. 2.0 A 3.

1) A 5.50 m length of 1.9 mm -diameter wire carries a 780 mA current when 23.0 mV is applied to its ends. The drift velocity is 1.2×10−5 m/s Part D Determine the electric field inside the wire. Express your answer to two significant figures and include the appropriate units. Part E Determine the number n of free electrons per unit volume. Express your answer using two significant figures.

Which way would current flow if the silver rod moved to the left?   Clockwise Counterclockwise No Current