The combined resistance R of two resistors R1 and R2 (R1, R2 > 0) is given by \(\frac{1}{R}=\frac{1}{R_{1}}+\frac{1}{R_{2}}\). If R1 + R2 = C (a constant), then maximum resistance R is obtained if
A. R1 > R2
B. R1 < R2
C. R1 = R2
D. None of these
Answer:C
The combined resistance R of two resistors R1 and R2 (R1, R2 > 0) is given by \(\frac{1}{R}=\frac{1}{R_{1}}+\frac{1}{R_{2}}\). If R1 + R2 = C (a constant), then maximum resistance R is obtained if
A. R1 > R2 B. R1 < R2 C. R1 = R2 D. None of these