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Two conducting wires X and Y of same diameter but different materials are joined in seriesacross a battery. If the number density of electrons in X is twice that in Y, find the ratio of drift velocity of electrons in the two wires. |
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Answer» Solution :Here `n_X=2n_Y` and `A_X= A_Y = A (say)` In a SERIES CIRCUIT the electric current flowing through the entire circuit is EXACTLY same, HENCE `I = n_X Ae (v_d)_x = n_Y A e(v_d)_Y` `rArr((v_d)_X)/((v_d)_Y) = (n_Y)/(n_X) = (n_Y)/(2n_Y) = 1/2 ` |
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