Ram has 2 different resistors whose resistance is unknown. He connects the resistors one by one across a battery source along with a galvanometer. He gets a higher deflection in the galvanometer when using the first resistor $R_{1}$ . So Which resistor has more resistance $R_{1}$ or $R_{2}$ ?

$R_{1}$

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$R_{2}$

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EQUAL

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CAN’T SAY

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Solution

The correct option is B
$R_{2}$

When volt across a resistor is constant then current in it and its resistance are inversely proportional. So $R_{1}$ has more deflection or more current means less resistance.

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When resistors $R_{1}$ and $R_{2}$ are connected in series across a battery of potential difference $V,$ the power dissipated by the resistors are $P_{1}$ and $P_{2}$ respectively. When they are connected in parallel across a battery of potential difference $E,$ the power dissipated is $P_{3}$ and $P_{4}$ respectively. Which one of the following is true?