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Resistance

If R1 and ...

Question

If $R_{1}$ and $R_{2}$ are the resistances of two resistors connected in series combination, their effective or net resistance is given by....

\frac{R_{1} R_{2}}{R_{1} + R_{2}}

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R_{1} + R_{2}

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R_{1} - R_{2}

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R_{1} R_{2}

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Solution

The correct option is B $R_{1} + R_{2}$
In a series combination of resistors, the end point of one resistor is connected to the starting point of second resistor. Then the effective resistance of the combination is equal to the sum of the resistances of individual resistors, If R1 and R2 are the resistances of two resistors connected in series combination, their effective or net resistance is given by $R_{n e t}$ = R1+R2. This is true for n' number of resistors connected in series combination.

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