Three resistors R1,R2 and R3 are connected in parallel and the combination is connected to battery,ammeter,voltmeter and key.draw suitable circuit diagram.
(a) obtain an expression for the effective resistance of the combination of resistors in parallel.
(b) why are electric bulbs filled with chemically inactive nitrogen or argon?
(c) what is meant by the statement that the rating of a fuse in a circuit is 5A?
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(a)1/Req=1/R1+1/R2+1/R3
(b) Electric bulbs are filled with chemically inactive Nitrogen or Argon so as to ensure that the the bulb's filament remains pure and does not react with any kind of atmospheric gases or impurities.
(c)The statement that the rating of a fuse in an electric circuit is 5A means that the fuse wire will only allow the flow of 5A of current. If current is flowing more than 5A then the fuse wire will melt to prevent internal damage to an appliance.
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(b) Electric bulbs are filled with chemically inactive Nitrogen or Argon so as to ensure that the the bulb's filament remains pure and does not react with any kind of atmospheric gases or impurities.
(c)The statement that the rating of a fuse in an electric circuit is 5A means that the fuse wire will only allow the flow of 5A of current. If current is flowing more than 5A then the fuse wire will melt to prevent internal damage to an appliance.
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