Independent variable and the dependent variable

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If I is the current in the external resistor R and r is the internal resistance of the cell, the equation for the whole circuit is:

E = I(R + r)         .......(i)

For the same current in the external resistor R, the terminal voltage is given by:

V = IR                .......(ii)

Use equations (i) and (ii) to solve for r by eliminating I, equation in the form:  y = mx + b

Identify the independent variable and the dependent variable

Reference no: EM132592077

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