Faraday’s law of electromagnetic induction can be written as:
The table outlines the standard international (SI) units of the main quantities involved in electromagnetic induction.
Quantity |
Symbol |
SI unit |
Magnetic flux |
ϕ |
|
Magnetic flux linkage |
|
Wb turns |
Electromotive force |
|
|
Magnetic flux density |
B |
|
Complete the table by filling in the missing symbols and SI units.
A galvanometer is an electromagnetic device that can measure small values of current by the deflection of a needle.
A coil is connected to a galvanometer centered at zero.
A magnet moves vertically into the coil so that the galvanometer deflects to the right as shown.
In the spaces provided, sketch the expected observations of the galvanometer needle when
![qu1c-fig-2](https://cdn.savemyexams.com/cdn-cgi/image/f=auto,width=1920/uploads/2022/09/qu1c-fig-2.png)
As the student removes the magnet from the coil, the galvanometer shows a constant value of 1.5 mV for 2.0 s.
Calculate the change in magnetic flux linkage as the student removes the magnet from the coil.
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