Physics
04.06.2021 19:50
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Which statement best describes what happens when a person sees a blue ball

Which statement best describes what happens when a person sees a blue ball
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alissalhenry
alissalhenry
4,5(93 marks)
Blue light reflected from the ball enters human eyes.
nevaehroyal0708
nevaehroyal0708
4,4(84 marks)

To solve this problem we must first find the potential on the body which is given as a product between the number of turns, the area and the variation of the magnetic field as a function of time. Once the potential is found, we will apply Ohm's Law with which we can find the induced current on the body. Our values are,

A = 7.00*10^{-4} m^2

\Delta B = 3.30T-0.5T

t = 0.99s

R = 1.8\Omega

a) The magnitude of average induced emf is given by

\epsilon_{emf} = NA (\frac{dB}{dt})

Here N =1

\epsilon_{emf} = (1)(7.00 x 10^-4 m2)[\frac{(3.3 T - 0.5 T)}{(0.99s)}]

\epsilon_{emf}= 0.00196 V

b) The magnitude of the induced current is

I = \frac{V}{R}

Here Resistance is

R = 1.80\Omega

I = \frac{(0.00196V)}{(1.80\Omega)}

I = 0.00108 A

Therefore the induced current is 0.00108A

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