TS EAMCET · Physics · Current Electricity
A current of \(2 \mathrm{~A}\) flows in an electric circuit as shown in figure. The potential difference \(\left(V_R-V_S\right)\), in volts \(\left(V_R\right.\) and \(V_S\) are potentials at \(R\) and \(S\) respectively) is
- A \(-4\)
- B \(+2\)
- C \(+4\)
- D \(-2\)
Answer & Solution
Correct Answer
(C) \(+4\)
Step-by-step Solution
Detailed explanation
Current through each arm \[ \begin{gathered} P R Q \text { and } P S Q=1 \mathrm{~A} \\ V_P-V_R=3 \mathrm{~V} \\ V_P-V_S=7 \mathrm{~V} \end{gathered} \] From Eqs. (i) and (ii), we get \[ V_R-V_S=+4 \mathrm{~V} \]
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