Author Question: If the current density in a wire is given by j = kr, 0 < r < R, where R is the radius of the ... (Read 40 times)

joesmith1212 · **on:** Jul 29, 2018

If the current density in a wire is given by j = kr, 0 < r < R, where R is the radius of the wire, the current in the wire is

A)

2kR3/3.
B)

3kR3/2.
C)

kR3/3.
D)

kR2.
E)

kR2/2.

Question 2

A wave has an amplitude 20.0 cm, a wavelength 3.00 m, and the wave travels 60.0 m in 12.0 s. What is the frequency of the wave?

A)

8.33 Hz

B)

250 Hz

C)

0.500 Hz

D)

1.67 Hz

E)

150 Hz