1. Give reasons for the following.
(a) An electric current does not flow in a circuit when the switch in the circuit is 'open'.
(b) The wire in an electric fuse is made of a material that melts easily.
(c) An electric bulb feels hot to touch after it has been on for some time.
(d) A magnetic needle gets deflected when it is brought close to a current carrying conductor
(e) The soft iron strip of an electric bell gets attracted to the electromagnet when the electric bell
is switched on.
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Answer:
* because circuit is broken
*so that it prevents from high current to pass through
* as bulb is glowing continuously it started emitting si much light and energy which makes it glass hot
*because when you switch on key current will flow and magnetic field will produce which causes deflection of needle
* as swich is on so electric bell produce magnetic field which attracts electromagnet
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