Embedded Files
HL Only
HL Only
What are the effects of relative motion between a conductor and a magnetic field?
What are the effects of relative motion between a conductor and a magnetic field?
Relative motion causes a change in magnetic flux, inducing an emf according to Faraday’s Law
If a conductor moves perpendicularly through a uniform magnetic field, an emf is induced
Lenz’s law determines the direction of the induced emf, ensuring the induced current opposes the change in flux (energy conservation).
How can the power output of electrical generators be increased?
How can the power output of electrical generators be increased?
Increase magnetic field strength B, rotation speed (frequency), or area A of the coil to enhance the rate of change of flux.
Use more turns of wire (N) in the coil, as induced emf scales with the number of loops.
Optimize coil orientation and mechanical efficiency to maximize sinusoidal emf output.
How did the discovery of electromagnetic induction affect industrialization?
How did the discovery of electromagnetic induction affect industrialization?
Electromagnetic induction enabled the development of generators and motors, providing efficient mechanical to electrical energy conversion.
It led to the widespread electrification of industries, enabling mass production, transportation (electric trains), and communication (telegraphs).
Industrialization accelerated as reliable electrical power became widely available, transforming economies and societies.
Understandings
Understandings
Magnetic flux equations
Time-changing magnetic flux induces an emf as given by Faraday’s law of induction
A uniform magnetic field induces an emf in a straight conductor moving perpendicularly to it equation
Direction of induced emf is determined by Lenz’s law and is a consequence of energy conservation
A uniform magnetic field induces a sinusoidal varying emf in a coil rotating within it
The effect on induced emf caused by changing the frequency of rotation
Google Sites
Report abuse