AP EAMCET · PHYSICS · Current Electricity
A \(8 \Omega\) resistor is connected to a battery that has an internal resistance of \(0.2 \Omega\). If the voltage across the battery (the terminal voltage) is \(10 \mathrm{~V}\), then the emf of the battery is
- A \(10.15 \mathrm{~V}\)
- B \(10.20 \mathrm{~V}\)
- C \(10.25 \mathrm{~V}\)
- D \(9.80 \mathrm{~V}\)
Answer & Solution
Correct Answer
(C) \(10.25 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
The given situation is shown below If \(I=\) current in circuit then Where, \[ \begin{gathered} E-I r=V \\ I=V / R \end{gathered} \] Here, given, \[ \begin{aligned} & R=8 \Omega \\ & r=0.2 \Omega V=10 \mathrm{~V} \end{aligned} \] Hence, circuit current…
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