Question

describe the simple experiment to show magnetic lines in a straight conductor​

Answer 1

Brief explanation of activity:

Connect the circuit as shown in the figure below. Switch on the battery so that the current begins to flow. Sprinkle some fine iron filings around the current carrying wire. Tap the surface gently. The iron filings get arranged in concentric circles which denotes the shape of magnetic field lines around the straight current carrying conductor (i.e. the wire).

When the direction of current is reversed, direction of field also gets reversed.

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