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Q7. A non-linear resistor whose characteristic is given by:

l (mA) = 0.1 V²

Is connected in series with a resistor of 680 Ω to a 16 V d.c. supply. Determine EACH of the following:

(a) The value of the voltage across each element;

(b) The circuit current;

(c) The value to which the linear resistance must be changed to give equal voltages across the two elements;

(d) The circuit current for the condition in Q2(c).