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Electromagnetic Induction AP Physics 2

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Questions and Answers

What happens when AC current from the primary coil moves across the secondary coil?

The primary coil becomes magnetized

A constant magnetic field is created

The secondary coil becomes demagnetized

A moving magnetic field is created, inducing a current in the secondary coil (correct)

What is the main application of a step-up transformer?

To amplify sound waves

To convert AC to DC

To decrease the voltage for low-voltage devices

To increase the voltage for high-voltage devices (correct)

What is the purpose of a microphone?

To convert sound waves to electronic signals (correct)

To amplify sound waves

To filter out noise

To convert electronic signals to sound waves

What induces a current in the coil of a microphone?

The movement of the wire in the magnetic field Signup and view all the answers

What is the formula to calculate the magnitude of the induced emf in a coil?

ε = NΔΦ/Δt Signup and view all the answers

Why is the absolute value of the EMF calculated?

Because the EMF can be negative Signup and view all the answers

What is the unit of magnetic flux?

Webers Signup and view all the answers

What happens when the magnetic field changes uniformly from 0 to 0.500 T in 0.80 s?

The induced emf increases Signup and view all the answers

What is the purpose of electromagnetic induction?

To transform voltage levels Signup and view all the answers

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 Signup and view all the answers

Electromagnetic Induction AP Physics 2

Choose a study mode

Podcast

Questions and Answers

What happens when AC current from the primary coil moves across the secondary coil?

What is the main application of a step-up transformer?

What is the purpose of a microphone?

What induces a current in the coil of a microphone?

What is the formula to calculate the magnitude of the induced emf in a coil?

Why is the absolute value of the EMF calculated?

What is the unit of magnetic flux?

What happens when the magnetic field changes uniformly from 0 to 0.500 T in 0.80 s?

What is the purpose of electromagnetic induction?

What is the relationship between the number of turns in a coil and the induced emf?

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