a) What would the Hall voltage be (in µV) if a 2.40 T field is applied across a 13-gauge copper wire (1.829 mm in diameter) carrying a 22.0 A current? (Assume the free charge density of copper is 8.342 ✕ 1028 e−/m3.)
a) What would the Hall voltage be (in µV) if a 2.40 T field is applied across a 13-gauge copper wire (1.829 mm in diameter) carrying a 22.0 A current? (Assume the free charge density of copper is 8.342 ✕ 1028 e−/m3.)
b)A mirror hangs 1.62 m above the floor on a vertical wall. A ray of sunlight, reflected off the mirror, forms a spot on the floor 1.12 m from the wall. Later in the day, the spot has moved to a point 2.50 m from the wall.
What is the change in the angle of elevation of the Sun, between the two observations?
c)Components of some computers communicate with each other through optical fibers having an index of refraction n = 1.45. What time in nanoseconds is required for a signal to travel 0.180 m through such a fiber?
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