Chapter 28: Q. 6 (page 790)
What is the magnitude of the potential difference across each resistor in FIGURE ?
Short Answer
The magnitude of potential difference across each resistance is and respectivelty.
Chapter 28: Q. 6 (page 790)
What is the magnitude of the potential difference across each resistor in FIGURE ?
The magnitude of potential difference across each resistance is and respectivelty.
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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?
Rank in order, from largest to smallest, the currents to through the four resistors in FIGURE
Compared to an ideal battery, by what percentage does the battery’s internal resistance reduce the potential difference across the resistor in FIGURE EX28.20?
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.
A long, diameter wire has a variable resistivity given by
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where x is measured from one end of the wire. What is the current if this wire is connected to the terminals of a battery?
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