Induction bingo

Exercise and reference answers

Clues and terms

1. Clue

   The SI unit of magnetic flux.

   Item

   Weber

2. Clue

   The SI unit of inductance.

   Item

   Henry

3. Clue

   Gave the rule for the polarity of the induced emf in 1834.

   Item

   Lenz

4. Clue

   Swirling currents induced in a bulk piece of conductor.

   Item

   Eddy currents

5. Clue

   The emf across a rod moving through a magnetic field.

   Item

   Motional emf

6. Clue

   The coil that rotates inside an AC generator.

   Item

   Armature

7. Clue

   Connect the spinning coil to the outside circuit.

   Item

   Slip rings

8. Clue

   Thin insulated sheets that cut down eddy currents in a core.

   Item

   Laminations

9. Clue

   The self-induced emf that opposes a change in current.

   Item

   Back emf

Instructions

Read each clue and tap the term it describes.

Explanation