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secondary 4 | Physics
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Why did the answer’s solution draw the dots and cross to answer the question? How do you do this question?
Date Posted: 4 years ago
Views: 332
If you see the blue marks represent the forces going "around" the wire.
Imagine that for each of the points (P R S Q) they will either push "down" or "up". Now imagine an arrow. The X represents an arrow seeing from behind, and a dot an arrow seeing from the front.
So if you have one arrow pushing down and another up, then you are magnetic field zero..
Hence P and R are the answers, so "A"
Imagine that for each of the points (P R S Q) they will either push "down" or "up". Now imagine an arrow. The X represents an arrow seeing from behind, and a dot an arrow seeing from the front.
So if you have one arrow pushing down and another up, then you are magnetic field zero..
Hence P and R are the answers, so "A"
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