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The magnitude of the charges on …

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The magnitude of the charges on three identical balls, A, B and C is in the ratio of 1:3:7. The charges on A and B are positive and the charge on ‘C’ is -1.4 x 10-7 C. Calculate (1) charge on A and B. (ii) charge on each when they were brought in contact and then separated.

Posted by Smiley __ 4 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Mradul Gupta 4 years, 5 months ago

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Mradul Gupta 4 years, 5 months ago

Charge on A is - 0.2×10^(-7)C Charge on B is - 0.6×10^(-7)C Charge on each after separation is -0.2×10^(-7)C If you want to see the solution then click on the link https://drive.google.com/file/d/1Il7W29znr9C0RmPqrVcwC_H6NH5URNQp/view?usp=drivesdk

Arman Gupta 4 years, 5 months ago

(A) LET CHARGES ON A, B AND C BE X, 3X AND 7X . BUT IT IS GIVEN THAT 7X = -1.4 x 10-7 C So it comes out that X=0.2x 10-7 C Then 3X = 0.6x 10-7 IT IS ALSO GIVEN THAT CHARGES ON A AND B ARE POSITIVE. SO CHARGES ON A, B AND C ARE 0.2x 10-7 C , 0.6x 10-7 C AND -1.4x 10-7 C (B) ON BRING IN CONTACT TOTAL CHARGE IS (0.2+0.6-1.4)x 10-7 C WHICH IS EQUAL TO -0.6x 10-7 C THIS CHARHE WILL BE EQUALLY DISTRIBUTED ON EACH BALL. SO CHARGE ON EACH BALL WILL BE (-0.6x 10-7)/3 = -0.2x 10-7

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