Basic Physics: Faraday's Law

Question 1

What law describes the currents produced by a changing magnetic field

Answer 1

Faraday’s law of induction

Question 2

What is Faraday’s first law?

Answer 2

A change in magnetic field while in the presence of a coil of wire will produce a voltage

Question 3

What is Faraday’s second law?

Answer 3

The amount of induction is equal to the rate of changing flux and the number of wire coils.

Question 4

What 2 factors can affect the voltages produced in a coil of wire when thinking about Faraday’s law?

Answer 4

the speed we are moving the magnetic field and the strength of this changing magnetic field

Question 5

True or false: tissue is considered electrically conductive?

Answer 5

True

Question 6

True or false: when moving a patient through magnetic flux, voltages can be produced in the optic nerve demonstrating visually seeing flashing lights?

Answer 6

True

Question 7

What are magnetophosphenes?

Answer 7

patient experiencing flashing lights due to moving a patient through magnetic flux

Question 8

In addition to magnetophosphenes, what other biological consideration is there for moving a patient through the magnetic field of an MRI machine?

Answer 8

PNS or Peripheral Nerve Stimulation - the induction of current in human tissue during an MRI exam causing discomfort or muscle twitching.