How can you draw the magnetic field lines of a bar magnet yourself?

Use a ruler and pencil

Use a compass needle

Use iron filings

Use a magnetometer

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Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.

Q1.

What is the direction of the magnetic field taken to be in the context of a compass needle?

Q2.

How are magnetic field lines represented around a bar magnet?

Q3.

Who accidentally discovered that a compass needle gets deflected when an electric current passes through a metallic wire nearby?

Q4.

What is the unit of magnetic field strength named after Hans Christian Oersted?