Figure OQ31.2 is a graph of the magnetic flux through a certain ...

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Figure OQ31.2 is a graph of the magnetic flux through a certain coil of wire as a function of time during an interval while the radius of the coil is increased, the coil is rotated through 1.5 revolutions, and the external source of the magnetic field is turned off, in that order. Rank the emf induced in the coil at the instants marked A through E from the largest positive value to the largest-magnitude negative value. In your ranking, note any cases of equality and also any instants when the emf is zero.
 
  1.C = D > B = A > E
  2.E > A = B = 0 > C > D
  3.A > B > D > C > E
  4.E > A > B = D = 0 > C

Question 2

State Bernoulli's principle.

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Answer to Question 1

4

Answer to Question 2

In simple terms, Bernoulli's principle states that where the velocity of a fluid is
maximum, the pressure is minimum. Where the pressure is minimum, the velocity of
the fluid is maximum.