Electromagnetism interactive Quiz

Questions.

Question 1.

Question 2.

Question 3.

Question 4.

Question 5.

Answers.

  1. a – equate F = qVB = mv^(2)/r
  2. b – Step up increases the voltage, it has more coils due to V primary/ V secondary = N primary / N secondary
  3. d – a decrease in back emf due to less change in flux increases the net voltage. Net voltage = voltage supplied – back emf
  4. b – An emf is induced which opposes the downward motion of the magnet – slowing it down according to lenz’s law
  5. a & c – magnetic break uses Eddy currents to slow it down. Induction cooktop uses eddy currents to transfer heat

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