Q196 / 225 · JEE Main 2005 · Physics

In the circuit, the galvanometer $G$ shows zero deflection. If the batteries $A$ and $B$ have negligible internal resistance, the value of the resistor $\mathrm{R}$ will be Figure

  • A
    $200 \Omega$
  • Correct answer
    B
    $100 \Omega$
  • C
    $500 \Omega$
  • D
    $1000 \Omega$

Solution

$\frac{12 \mathrm{R}}{500+\mathrm{R}}=2$

Hence, the correct answer is option: 'B'.

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