In a demonstration, a 4.00 cm2 square coil with 10000 turns enters a larger square region with a uniform 1.50 T magnetic field at a speed of 100 m/s. The plane of the coil is perpendicular to the field lines. If the breakdown voltage of air is 4000 V/cm on that day, the largest gap you can have between the two wires connected to the ends of the coil and still get a spark is
a. 7.5 × 10^?3 cm.
b. 0.015 cm.
c. 7.5 cm.
d. 13 cm.
e. 15 cm.
c
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