Electromagnetic induction

What is electromagnetic induction?

• a) The attraction of opposite magnetic poles
  

• b) The generation of an electric current by a changing magnetic field
  

• c) The movement of charges in a conductor without any magnetic influence
  

• d) The repulsion of like magnetic poles

What factor does NOT affect the magnitude of induced voltage?

• a) Strength of the magnetic field
  

• b) Speed of movement
  

• c) Number of turns in the coil
  

• d) Type of conductor material (copper vs. aluminum)

In a generator, how can we increase the induced current?

• a) Move the conductor faster through the magnetic field
  

• b) Use a weaker magnetic field
  

• 
  c) Decrease the number of turns in the coi

• 
  d) Use a thinner wire

Which of the following devices operates on the principle of electromagnetic induction?

• a) Battery
  

• b) Transformer
  

• c) Solar panel
  

• d) Resistor

In a simple generator, what happens when the coil rotates faster?

• a) The induced voltage decreases
  

• b) The induced voltage increases
  

• c) The magnetic field strength increases
  

• d) The current stops flowing