1. two identically-sized loops aligned vertically carry current in opposite dire
ID: 2306069 • Letter: 1
Question
1.
two identically-sized loops aligned vertically carry current in opposite directions. If the bottom loop current is counterclockwise (from a bird's eye perspective), what is the direction of the net magnetic force exerted on the top loop
2.
A conservation of energy experiment apparatus uses a mass hanging from a spring to study mechanical energy conservation. When the apparatus is transformed into a magnetic experiment by connecting the ends of the spring (with coils assumed to be electrically insulated) to each terminal of a battery:
the spring will extend, lowering the weight.
the spring will contract, raising the weight.
the weight will not move.
whether or not the weight moves up or down depends on what the weight is made of (i.e., whether or not it is magnetizable).
None of these are true.
A.the spring will extend, lowering the weight.
B.the spring will contract, raising the weight.
C.the weight will not move.
D.whether or not the weight moves up or down depends on what the weight is made of (i.e., whether or not it is magnetizable).
E.None of these are true.
Explanation / Answer
1. Force on upper loop will be in the upward direction.
2. Option D will be correct.
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