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Tushar Watts Grade: 12
        

Ques1) Two square metal plates A and B  are of the same thickness and material. The side of B is twice of that A. These are connected in series. Let the resistances of A and B are denoted by RA and RB. Then show that RA / RB =1.


Ques2) A,B,C,D are four points in succession at equal distances along a wire and A,B,C,D are also joined by two ther wires of the same length as the distance b/w those pairs of points measured along the original wire. A current I enters the network thus formed, at A and leaved at D. Show that the electric current in BC is 1/4.


Ques3) A potentiometer wire of length 100 cm has  aresitance 10 ohm. It is connected in series with a reisiance and an accumulator of emf 2 V and of negligible reistance. A source of emf 10 mV is balanced against the length of 40 cm of the potentiometer wire. What si the value of the external resistance ?

7 years ago

Answers : (1)

Vijay Luxmi Askiitiansexpert
357 Points
										

Dear Tushar


Please post one question in posting. Whatever query you have post it forum but one query in one posting.


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Please feel free to post as many doubts on our disucssion forum as you can. If you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation.



Regards,

Askiitians Expert


7 years ago
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