Physics
State two properties of a bar magnet.
Electro-Magnetism
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Answer
The two properties of a bar magnet are:
- It attracts small pieces of iron i.e. it has attractive property.
- It always rests in the north-south direction when suspended freely i.e. it has directive property.
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Related Questions
Write true or false for each statement:
(a) A current carrying coil when suspended freely can rest in any direction.
(b) A coil carrying current behaves like a magnet.
(c) In an electromagnet, the core is made up of copper.
(d) An electric bell uses an electromagnet.
(e) An electromagnet with soft iron core is a temporary magnet.
(f) We use cell as the source of electricity to run an electric immersion rod.
(g) A torch bulb glows if the terminals of the bulb are connected to the terminals of a cell by the metallic wire.
(h) Wool is a conductor of electricity.
(i) Silver is an insulator of electricity.
(j) Our body is a conductor of electricity.
(k) For a circuit to be complete, every part of it must be made up of conductors.
(l) All metals are conductors of electricity.
(m) The switch should not be touched with wet hands.
(n) A switch is an on-off device in an electric circuit.
Match the following:
Column A Column B (a) Human body (i) electric bell (b) Silk thread (ii) current (c) Charge in motion (iii) conductor (d) Soft iron (iv) electromagnet (e) Electromagnet (v) insulator How will you test whether a given rod is a magnet or not?
How will you test whether a given rod is made of iron or not?