1. When you connect a single resistance R in a single-loop with a power supply, the current is measured at 5.0 A. When you connect an additional resistance of 2.0 2 is put into the circuit in series with R, the current decreases to 4.0 A. What is R?

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Chapter20: Electric Current, Resistance, And Ohm's Law
Section: Chapter Questions
Problem 14CQ: The power dissipated in a resistor is given by P = V2/R, which means power decreases if resistance...
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1. When you connect a single resistance R in a single-loop with a power supply, the
current is measured at 5.0 A. When you connect an additional resistance of 2.0 2 is put
into the circuit in series with R, the current decreases to 4.0 A. What is R?
2. In the circuit in the figure, current Ij is
24 V
3.0 A and the values of E and R are
а
unknown. Starting with guesses for the
directions of the currents I2 and I3 as
shown by the arrows, what are the
currents I2 and I3?
R
3.0 N
|I,
6.0 N
Transcribed Image Text:1. When you connect a single resistance R in a single-loop with a power supply, the current is measured at 5.0 A. When you connect an additional resistance of 2.0 2 is put into the circuit in series with R, the current decreases to 4.0 A. What is R? 2. In the circuit in the figure, current Ij is 24 V 3.0 A and the values of E and R are а unknown. Starting with guesses for the directions of the currents I2 and I3 as shown by the arrows, what are the currents I2 and I3? R 3.0 N |I, 6.0 N
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