Q15. A circuit comprising a DC voltage source, three resistors, and two LEDS is shown, where R=1 2, R1 = 2 2, and R2 is a variable resistor. The forward voltage drops of Li and L2 are VF1 = 2.2 V and VF2 = 2.8 V, respectively. It is known that L1 consumes 15% more power than L2 does when R2 = 2 2. To make Li and L2 consume equal power, what should the value of R2 be? Choose the value that is closest to the answer. I I2 R R1 R2 v (+ Li V L А. 1.608 N В. 1.717 N C. 1.859 N D. 2.306 N Е. Unsolvable because the given information is insufficient.
Q15. A circuit comprising a DC voltage source, three resistors, and two LEDS is shown, where R=1 2, R1 = 2 2, and R2 is a variable resistor. The forward voltage drops of Li and L2 are VF1 = 2.2 V and VF2 = 2.8 V, respectively. It is known that L1 consumes 15% more power than L2 does when R2 = 2 2. To make Li and L2 consume equal power, what should the value of R2 be? Choose the value that is closest to the answer. I I2 R R1 R2 v (+ Li V L А. 1.608 N В. 1.717 N C. 1.859 N D. 2.306 N Е. Unsolvable because the given information is insufficient.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:Q15. A circuit comprising a DC voltage source, three resistors, and two LEDS is shown, where
R= 1 2, R1 = 2 N, and R2 is a variable resistor. The forward voltage drops of L1 and L2 are
VF1 = 2.2 V and VF2 = 2.8 V, respectively. It is known that L1 consumes 15% more power
than L2 does when R2 = 2 2. To make L1 and L2 consume equal power, what should the
value of R2 be? Choose the value that is closest to the answer.
%3D
I
I2
R
R1
R2
L2
V
А.
1.608 2
В.
1.717 N
С.
1.859 N
D.
2.306 2
Е.
Unsolvable because the given information is insufficient.
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