The smallest time interval in which the magnetic field can be turned on or off to induced the emf is 47.5 s.
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Emf induced in the coil</h3>
The emf induced in the coil is calculated as follows;
emf = dФ/dt
where;
- dФ is change in flux
- dt is change in time
0.12 = 5.7/dt
dt = 5.7/0.12
dt = 47.5 s
Thus, the smallest time interval in which the magnetic field can be turned on or off to induced the emf is 47.5 s.
Learn more about emf here: brainly.com/question/13744192
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The amount of solid does not affect how you are describing the solid so a is the answer
The answer is "Conduct an experiment" :)
