Engineering
Physics
Ohm Law and Current Basics
Basic Circuit Theory and Kirchoffs Law for DC Circuit
SI Units
Question

In the circuit shown, R2 is varied from zero to infinity, keeping other values constant. Which of the following graph is/are correct?

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Solution
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If R2 = 0 V = 0

If R1→∞V=εR1R1+r

Now if R2 = 0 ; I2=εR;I1=0 

and If R2→∞;I2=0;I1=εR1+r