Please show all steps. 20 cm X X x 20 cm a 10 68) In the figure, a wire and a 10

Question

Please show all steps.

20 cm X X x 20 cm a 10 68) In the figure, a wire and a 10Q resistor are used to form a circuit in the shape of a square, 20 cm by 20 cm. A uniform but nonsteady magnetic field is directed into the plane of the circuit. The magnitude of the magnetic field is decreased from 2.70 T to 0.90 Tin a time interval of96 ms. The average induced current and its direction through the resistor, in this time interval, are closest to: A) 45 mA from b to a B) 75 mA, from b to a C) 45 mA from a to b D) 110 mA, from a to b E) 75 mA from a to b

Explanation / Answer

apply induced emf e = -NAdB/dt

e = - 1* 0.2*0.2* (2.7-0.9)/0.096

e = -0.75 volts

induced current i = e/R

i = 0.75/10

i = 0.075

or 75 mA from b to A

opiton B

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