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Write the following statements are True or False a. The magnetic strength of a conductor decreases with the increase in current.b. A fuse wire breaks when the circuit is over loaded.c. The strength of magnetic field produced by a coil depends on the number of turns of the wire.d. Magnetism of an electromagnet only lasts till the current is passed through it. |
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Answer» 1. Why does a compass needle get DEFLECTED when brought near a bar magnet?Ans. A compass needle is a small bar magnet with north and south pole. The compass needle deflects due to repulsion/attraction with the bar magnet.2. Draw MAGNETIC field lines around a bar magnet.Ans.3. List the properties of magnetic lines of force.Ans. Properties of magnetic field lines of force: (i) Magnetic field lines travel from N-pole of magnet towards 5-pole, outside the magnet and from S-pole to N-pole inside the magnet. (II) The strength of magnet/magnetic field is given by how close the field lines are if the field lines are CLOSER magnet is stronger. (iii) No two magnetic field lines ever intersect each other. |
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