Answer:
Explanation:
The explanation is given in the attached document.
It's on your exam boards specification or just google it. the foundation paper will have the same equations as higher, but higher just has more.
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Answer:
The poles of an electromagnet can even be reversed by reversing the flow of electricity. If a wire carrying an electric current is formed into a series of loops, the magnetic field can be concentrated within the loops. ... All of their little magnetic fields add together, creating a stronger magnetic field.
Explanation:
Wavelength*frequency=velocity
(331m/s)/(.6m)
Frequency = 551.666 1/s
