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9 December, 22:51

A fixed resistor, (R) is in parallel with a variable resistor; both are connected to a real battery (internal resistance is not negligible). A) Originally the fixed and variable resistors have the same resistance. (b) As the resistance of the variable resistor is decreased, the rate at which energy is transferred to the fixed resistor

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  1. 10 December, 00:42


    Energy in a resistor = I²R

    According to ohms law, V=IR

    Inititally current through both the resistors is same. When resistance of variable resistor is decreased, current through it increases and less current flows through fixed resistor. Consequently energy dissipated in fixed resistor also decreases.
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