Students are asked to draw the pattern and direction of the magnetic field due to a direct current (d.c.) in a straight wire. Diagrams 1, 2 and 3 are three of their answers. [Figure showing three diagrams. Diagram 1 has concentric circles with clockwise arrows. Diagram 2 has concentric circles with counter-clockwise arrows. Diagram 3 has concentric circles with arrows pointing outwards radially]. The students do not know the direction of the current in the wire. Which diagrams show possible patterns and directions for the magnetic field due to the current in the wire?
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The correct answer is B. This question tests the candidate's understanding of magnetism within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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