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Standard XII

Physics

Current Density Vector

A conducting ...

Question

A conducting wire of non uniform cross section is shown in figure. If wire carries current "i", then which of the following is correct regarding $\to E$ ?

E_{1} > E_{2} > E_{3}

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E_{3} > E_{1} > E_{2}

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E_{3} > E_{2} > E_{1}

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E_{1} = E_{2} = E_{3} = 0

(conducting wire)

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Solution

The correct option is B $E_{3} > E_{1} > E_{2}$
$j = \frac{i}{A}$ and $j = σ E$
$j_{3} > j_{1} > j_{2}$ $\Rightarrow$ $E_{3} > E_{1} > E_{2}$

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A conducting wire of non uniform cross section is shown in figure. If wire carries current "i", then which of the following is correct regarding →E?

The correct option is B E3>E1>E2j=iA and j=σE j3>j1>j2 ⇒ E3>E1>E2

A conducting wire of non uniform cross section is shown in figure. If wire carries current "i", then which of the following is correct regarding $\to E$ ?

The correct option is B $E_{3} > E_{1} > E_{2}$
$j = \frac{i}{A}$ and $j = σ E$
$j_{3} > j_{1} > j_{2}$ $\Rightarrow$ $E_{3} > E_{1} > E_{2}$