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Current Electricity — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsCurrent Electricity1 Mark
MCQ
In the shown circuit, what is the potential difference across $A$ and $B$

Image

  • A
    $50 \mathrm{~V}$
  • ✓
    $45 \mathrm{~V}$
  • C
    $30 \mathrm{~V}$
  • D
    $20 \mathrm{~V}$
✓

Answer

Correct option: B.
$45 \mathrm{~V}$
(b) If all are in series then $R_{e q}=12 \Omega$If all are in parallel then $R_{e q}=\frac{4}{3} \Omega=1.33 \Omega$If two are in series then parallel with third, $R_{e q}=\frac{8}{3}=2.6 \Omega$If two are in parallel then series with third, $R_{e q}=6 \Omega$

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