Author Question: A square loop of wire has a current going around it. The magnetic field from the current on each ... (Read 80 times)

leo leo · **on:** Jul 28, 2018

A square loop of wire has a current going around it. The magnetic field from the current on each side of the loop results in a magnetic force on the wire on the opposite side. Each resulting magnetic force on the opposite side wire
a. pushes inward on the loop.
b. is actually zero since a current cannot push on itself.
c. depends on whether the current is clockwise of counterclockwise.
d. pushes outward on the loop.

Question 2

A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 5.0 cm. If a timer is started when its displacement is a maximum (hence x = 5 cm when t = 0), what is the acceleration magnitude when t = 3 s?
a. 31.6 m/s2
c. 10.5 m/s2
b. 15.8 m/s2
d. zero