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प्रश्न
A resistor of 8 ohms is connected in parallel with another resistor X. The resultant resistance of the combination is 4.8 ohms. What is the value of the resistor X?
उत्तर
When the two resistors are connected in parallel, we have:
`1/R=1/R_1+1/R_2`
`1/4.8=1/8+1/x`
`1/4.8-1/8=1/x`
`(1-0.6)/4.8=1/x`
`0.4/4.8=1/x`
`x=12`Ω
`x=12`Ω
Therefore, the value of X=12 I
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