Two resistors of resistance R are connected in series.The combination is connected in parallel to a resistor of resistance 2R.What is the resistance of this combination of resistors?
A)0.5 R
B)R
C)1.0 R
D)2.0 R
E)2.5 R

Question

Quizplus · Accepted Answer

When two resistors of resistance R are connected in series, their total resistance is 2R. This combination in parallel with another resistor of 2R results in a total resistance of (2R*2R)/(2R+2R) = 4R^2/4R = R.

Two Resistors of Resistance R Are Connected in Series