A sinusoidally oscillating current I ( t ) I(t) with an amplitude of 2.55 A 2.55 A and a frequency of 255 cycles per second 255 cycles per second is carried by a long, straight wire. A rectangular loop of copper wire with dimensions b = 72.2 cm b=72.2 cm by c = 32.5 cm c=32.5 cm is located a = 80.2 cm a=80.2 cm from the straight wire, and is coplanar with it. Calculate the average power P avg Pavg dissipated by the loop if its resistance is 44.3 Ω .

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Explanation:

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.