A current is induced in a conducting loop that lies in a horizontalplane, and th

Question

A current is induced in a conducting loop that lies in a horizontalplane, and the induced current is clockwise when viewed from above.Which of the following statements could be true? amagnetic field whose magnitude is increasing is directed verticallydownward
aconstant magnetic field is directed vertically upward
amagnetic field whose magnitude is decreasing is directed verticallyupward
aconstant magnetic field is directed vertically downward
amagnetic field whose magnitude is decreasing is directed verticallydownward amagnetic field whose magnitude is increasing is directed verticallydownward
aconstant magnetic field is directed vertically upward
amagnetic field whose magnitude is decreasing is directed verticallyupward
aconstant magnetic field is directed vertically downward
amagnetic field whose magnitude is decreasing is directed verticallydownward amagnetic field whose magnitude is increasing is directed verticallydownward
aconstant magnetic field is directed vertically upward
amagnetic field whose magnitude is decreasing is directed verticallyupward
aconstant magnetic field is directed vertically downward
amagnetic field whose magnitude is decreasing is directed verticallydownward

Explanation / Answer

Only the last one could be true. The first and third optionswould induce a counterclockwise current. The second and fourthoptions (constant magnetic field) would not induce anycurrent. . a magnetic field whose magnitude isincreasing is directed vertically downward
a constant magnetic field is directedvertically upward
a magnetic field whose magnitude isdecreasing is directed vertically upward
a constant magnetic field is directedvertically downward
amagnetic field whose magnitude is decreasing is directed verticallydownward

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