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Electricity

Blazing goIITian

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18 Apr 2008 09:22:31 IST

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For the circuit shown in the figure which of the following staements is true:-

A) with S1 closed, V1 = 15V, V2 = 20V

B) with S3 closed, V1=V2=25V

C) with S1and S2 closed, V1=V2=0

D) withS1 and S3 closed, V1=30V, V2=20V

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Comments (6)

aman

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Joined: 18 Apr 2008

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18 Apr 2008 10:11:03 IST

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when grounded the potenial of the grounded body becomes 0.

thus the outer plates are at 0 potenial.

thus, V1=V2=0

suresan

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18 Apr 2008 12:11:15 IST

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D) with s1 and S3 closed V1=30 V and v2 = 20 V.

Abhay Kumar

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18 Apr 2008 15:23:41 IST

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it should be 'D'

megha aggarwal

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19 Apr 2008 10:08:06 IST

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please explain the answer

megha aggarwal

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19 Apr 2008 10:18:05 IST

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yes ans is D... but how??

varsha valli g.

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19 Apr 2008 11:51:59 IST

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when the capacitor is grounded the grounded plate is at potential =0.but the other plate will have its charge and also a potential due to it.since S2 is not closed,thus the potential of the inner plates remain 30 and 20 only.
V1=30-0=30
V2=20-0=20
thus ans is d)
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