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![[Post New]](/templates/default/images/icon_minipost_new.gif) 18 Sep 2008 17:35:05 IST
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CAPACITANCE QUESTION (CONCEPTUAL)
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18 Sep 2008 17:43:22 IST
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HERE QUES IS LIKE THIS
CAPACITOR C1 OF CAPACITANCE 1 microfarad and capacitor of capacitance 2microfarad are seperately charged folly by battery
2capacitor are then allowed to discharge through equal resistor at time t=0
(a)current in each discharging cicuit is 0 at t=0
(b)current in each discharging cicuit at t=0 are equal but not 0
(c)current in each discharging cicuit at t=0 are unequal
(d)capacitor c1 loses 50% of charge sooner than c2 loses 50%its charge
(more than one options are correct)
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18 Sep 2008 21:16:30 IST
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Capacitor Discharge Calculation
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The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp. |
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18 Sep 2008 21:24:26 IST
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Thus from above theory
I = (V0 / R) * exp (-t/RC)
For the two capacitors C is different but when
t= 0
I = (V0 / R) and is independent of capacitance.
Thus
(b)current in each discharging cicuit at t=0 are equal but not 0
is the correct option
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The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp. |
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Option (d) is also correct correct
That is (d)capacitor c1 loses 50% of charge sooner than c2 loses 50%its charge
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The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp. |
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