Question 43
Electromagnetic InductionThe iron core of an induction coil is made from bundles of wires so as to
- A.minimize eddy-currents
- B.generate eddy-current
- C.prevent sparking at the contact breaker
- D.get the greatest possible secondary voltage
Show the answer and explanation
Answer: A (minimize eddy-currents)
Explanation
Splitting the core into thin insulated wires breaks up the paths of eddy currents, so less energy is wasted as heat in the core.