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A current I is flowing through a wire of non-uniform cross-section as shown in the figure. Which of…
A current I is flowing through a wire of non-uniform cross-section as shown in the figure. Which of the following options gives the correct variation of current ($I$), drift velocity ($v$), and current density ($j$) across the wire?
- (a)$I_1 > I_2$, $j_2 = j_1$, $v_2 < v_1$
- (b)$I_1 = I_2$, $j_2 > j_1$, $v_2 > v_1$
- (c)$I_1 < I_2$, $j_2 < j_1$, $v_2 = v_1$
- (d)$I_1 = I_2$, $j_2 = j_1$, $v_2 = v_1$
Answer
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From ISC 2025 Practice Physics, question 18.