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Proportionality (Chapter 8 (At DC current , strength magnetic field will…
Proportionality
Chapter 8
At DC current , strength magnetic field will be:
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An electric current or a changing electric field induces a magnetic field.
A changing magnetic field induces an electric field.
مالها دخل بس أهم شي في كل التشابتر بتجي :)
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Chapter 6
Speed of a wave/sound
Depends on medium , INDEPENDENT on the length
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frequency and wavelength are inverse proportional so that speed will be constant UNLESS it changes the medium
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