10 Questions
What happens when AC current from the primary coil moves across the secondary coil?
A moving magnetic field is created, inducing a current in the secondary coil
What is the main application of a step-up transformer?
To increase the voltage for high-voltage devices
What is the purpose of a microphone?
To convert sound waves to electronic signals
What induces a current in the coil of a microphone?
The movement of the wire in the magnetic field
What is the formula to calculate the magnitude of the induced emf in a coil?
ε = NΔΦ/Δt
Why is the absolute value of the EMF calculated?
Because the EMF can be negative
What is the unit of magnetic flux?
Webers
What happens when the magnetic field changes uniformly from 0 to 0.500 T in 0.80 s?
The induced emf increases
What is the purpose of electromagnetic induction?
To transform voltage levels
What is the relationship between the number of turns in a coil and the induced emf?
The induced emf is directly proportional to the number of turns
Learn about the process of using magnetic fields to produce voltage and current. Discover how Michael Faraday discovered electromagnetic induction and its principles.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
