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Draw E-r graph for 0 ltrlt b, if two p...

Draw ` E-r` graph for ` 0 ltrlt b`, if two point charges a `&` b are located `r` distance apart , when
(i) both are + ve
(ii). Both are -ve
(iii). A is + ve and b is -ve
(iv) a is -ve and b is + ve

Text Solution

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The correct Answer is:
` (##NG_PHY_C01_E01_098_S01##)`.
(i)
`(1)` Field will be zerp at centre and at a and b `E` will be `infty`
` (2)` For `r lt b/2` field will be towards `b` and for `r`
`gt b/2 ` field will be towards a.
(ii) When both charge are negative

(iii) When a is `+` and is `-`
` (##NG_PHY_C01_E01_098_S03.png" width="80%">
(iv) When a is (-) and `b` is `+`
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