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11. A coil of area 0.2 m² is placed in a magnetic field so that the normal to its area is
in the direction of the field initially (left diagram), and then is turned 90⁰ (right
diagram). If the magnitude of the magnetic field is: B = 0.5 T, and it takes 0.1 s to
turn the coil, what is the average emf induced in the coil during this period of
time?
a) 1 V
b) 2 V
c) 3 V
d) 4 V
e) 5 V
TA
B
B

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