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Two point-like charge a and b whose strengths are equal in absolute value are positioned at a certain distance from each other. Assumeing the field strenght is positive in he direction of the r axis. Determine the sign of the charge for each distribution of the field strenght between charge for each distribution of the field strenght between charges shwon in fig. |
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Answer» Solution :(a) As electric fild tends AWAY at a and towards at b, there should be positive charge at a and NEGATIVE charge at b, i.e., `q_(a)` is '+' and `q_(b)` is '-'. (b) The NEUTRAL point EXISTS between a and b only when both `q_(a)` and `q_(b)` are of same sign. As direction of electric FIELD is away from both, both charges are positive, i.e., `q_(a)` is '+' and `q_(b)` is '+' (c ) `q_(a)` is '-' and `q_(b)` is '+'`. (d) `q_(a)` is '-' and `q_(b)` is '-'. |
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