Chapter 28: Q. 29 (page 791)
The 10 Ω resistor in FIGURE EX28.29 is dissipating of power. How much power are the other two resistors dissipating?
Short Answer
The power of other two resistors areand.
Chapter 28: Q. 29 (page 791)
The 10 Ω resistor in FIGURE EX28.29 is dissipating of power. How much power are the other two resistors dissipating?
The power of other two resistors areand.
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Get started for freeA circuit you’re building needs an ammeter that goes from to a full-scale reading of . Unfortunately, the only ammeter in the storeroom goes from to a full-scale reading of only . Fortunately, you’ve just finished a physics class, and you realize that you can make this ammeter work by putting a resistor in parallel with it, as shown in FIGURE P28.57. You’ve measured that the resistance of the ammeter is, not theof an ideal ammeter.
a. What value of R must you use so that the meter will go to full scale when the current I is?
b. What is the effective resistance of your ammeter?
For the circuit shown in FIGURE P28.62, find the current through and the potential difference across each resistor. Place your results in a table for ease of reading.
a. What are the magnitude and direction of the current in the resistor in FIGURE ?
b. Draw a graph of the potential as a function of the distance traveled through the circuit, traveling cw from at the lower left corner.
You have a resistor, a resistor, a resistor, and a battery. Draw a diagram of a circuit in which all three resistors are used and the battery delivers 9.0 W of power.
In FIGURE EX28.30, what is the value of the potential at points ?
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