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Current Electricity — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsCurrent Electricity1 Mark
MCQ
As the switch $S$ is closed in the circuit shown in figure, current passed through it isImage
  • ✓
    $4.5 \mathrm{~A}$
  • B
    $6.0 \mathrm{~A}$
  • C
    $3.0 \mathrm{~A}$
  • D
    Zero
✓

Answer

Correct option: A.
$4.5 \mathrm{~A}$
$ E=x l=i \rho l$
$\Rightarrow i=\frac{E}{\rho l}=\frac{E}{\rho l}=\frac{2.4 \times 10^{-3}}{1.2 \times 5}=4 \times 10^{-4} \mathrm{~A}$.

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