Please show all your work. 1. A length of wire 36.0 cm long with a current of 1.

Question

Please show all your work.

1. A length of wire 36.0 cm long with a current of 1.3 A passes through a uniform horizontal magnetic field of 0.44 T at an angle 28 degrees from the vertical as shown in the diagram below.

a) Write (in words) the direction (if any) of the magnetic force on the wire. Explain how you know.

b) What is the magnitude of this force?

2. The lasers we use in lab say they output electromagnetic radiation in vacuum at a wavelength of 650 nm.

a) What is the speed of the radiation from these lasers in vacuum?

b) What is the frequency of the radiation from these lasers in vacuum?

c) Is the radiation from these lasers visible to our eye? If so, what color does the light appear?

Explanation / Answer

magnetic force F = ilBsin theta

F = 1.3*0.36*0.44* sin (90-28)

F =0.1818 N

2.

1a. v = 3*10^8 m/s

2b. v=Lf

f = 3*10^8/650nm =4.61*10614 Hz

3c. orange colour

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