1.

A cell is connected to a 9 ohm resistance, because of which heat of 400 J is produced per second due to current flowing through it. Obtain the potential difference applied across the resistance.

Answer»


Solution :`"Given:RESISTANCE (R) "=9Omega,"Heat (H) = 400 J,"`
TIME `(t)=1s`
`"To find:POTENTIAL difference (V)"`
`"Formula:H"=(V^(2)t)/(R)`
`"Calculation:From formula,"`
`V=sqrt((HxxR)/(t))`
`=sqrt((400xx9)/(1))`
`=sqrt(400)xxsqrt(9)`
`=20xx3`
`=60V`


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