Q. Consider a capacitor charging circuit. Let be the charge given to the capacitor in time interval of and be the charge given in the next time interval of . Let charge be deposited in a time interval and the next charge is deposited in the next time interval . Then :

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A

B

C

D

Solution:

Initial rate of charging is fast so and in second case as amount of charges are equal in the two intervals so .

Questions from Current Electricity

1. Two sources of equal emf are connected to an external resistance . The internal resistances of the two sources are and If the potential difference across the source having internal resistance , is zero, then :

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2. In the network shown in figure, each resistance is equal to . The resistance between the points and is

3. A letter ' ' is constructed from a uniform wire with resistance per The sides of the letter are and the cross piece in the middle is long. The apex angle is The resistance between the ends of the legs is

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For which of these junctions, is the following equation correct ?

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