Author Question: Two long parallel wires 40 cm apart are carrying currents of 10 A and 30 A in the opposite ... (Read 90 times)

saliriagwu · **on:** Jul 28, 2018

Two long parallel wires 40 cm apart are carrying currents of 10 A and 30 A in the opposite direction. What is the magnitude of the magnetic field halfway between the wires?
a. 3.0 105 T
c. 1.0 105 T
b. 2.0 105 T
d. 4.0 105 T

Question 2

A 0.20-kg object is attached to a spring with spring constant k = 10 N/m and moves with simple harmonic motion over a horizontal, frictionless surface. At the instant that it is displaced from equilibrium by -0.060 m, what is its acceleration?
a. 360 m/s2
c. 3.0 m/s2
b. -30 m/s2
d. 0.18 m/s2