Physics
The diagrams given below show some magnetic field patterns.
Answer the following questions :
(a) Which pattern shows uniform magnetic field lines?
(b) Which pattern is for a straight current carrying wire?
(c) Which pattern is depicted by current in a loop?
Electro-Magnetism
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Answer
(a) Pattern D
Reason — Pattern D shows uniform magnetic field lines because it contains parallel, equally spaced straight lines indicating a uniform magnetic field.
(b) Pattern A
Reason — The pattern for the magnetic field around a straight current carrying wire is concentric circles around it which is shown in pattern A. So, A shows pattern of magnetic field for a straight current carrying wire.
(c) Pattern B
Reason — In pattern B, magnetic field lines are emerging from the loop and curving which is equivalent to a circular current carrying loop. So, B shows pattern depicted by current in a loop.
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