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Choose the statement(s) that is/are true of a magnetic field. (i) A magnetic needle placed in a...

Question:

Choose the statement(s) that is/are true of a magnetic field.

(i) A magnetic needle placed in a magnetic field will align in the direction of the field.

(ii) Magnetic field lines start at the north pole and end at the south pole.

(iii) A commonly used unit for measuring magnetic field is the gauss (G).

(iv) The SI unit for magnetic field is the tesla (T) and it is the same as {eq}N \cdot A^{-1} \cdot m^{-1} {/eq}

Magnets

Magnets are materials that have a magnetic field in their surrounding region of space. They always exist as dipoles, ie, all magnets have a north pole and a south pole. Magnets can be naturally occurring or artificially created.

Answer and Explanation:

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(i)True

The magnetic needle experiences a torque and will rotate until it gets aligned to the direction of the magnetic field.

(ii)True

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What is a Magnetic Field?

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Chapter 7 / Lesson 2
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Magnetic fields fill the space around all magnets, but they're impossible to detect with our own senses. We'll use a common tool to map out a magnetic field and then discuss ferromagnetic materials to see how a magnetic field can be used to create new magnets.


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