Magnetism Quiz 3

___ Law defines the magnetic field generated by a long straight wire

• Lenz'
• Faraday's
• Ampere's

___ Law says that the Induced current is proportional to the change of magnetic flux 

• Lenz'
• Faraday's
• Ampere's

___ Law says that a current produced by an induced emf moves in a direction so that its magnetic field opposes the original change in flux

• Lenz'
• Faraday's
• Ampere's

Tags

NGSS.HS-PS2-5

VS / VP = NS / NP
If the primary coil of a transformer has 100 turns and has 120V passing through it, how many turns will be needed in the secondary coil to produce 12V?

• 100
• 20
• 12
• 10

Step-up transformers are used to increase voltage for transmission lines. The reason for this is top prevent the loss of ___

• charges
• power
• voltage
• resistance