Chapter 28: Q. 6 (page 789)
Rank in order, from largest to smallest, the powers to dissipated by the four resistors in FIGURE
Short Answer
The rank in which power is dissipated, from largest to smallest, is
Chapter 28: Q. 6 (page 789)
Rank in order, from largest to smallest, the powers to dissipated by the four resistors in FIGURE
The rank in which power is dissipated, from largest to smallest, is
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Get started for freeThe capacitor in FIGURE begins to charge after the switch closes at.
a. What is a very long time after the switch has closed?
b. What isin terms of E,R, and C?
c. In this circuit, does localid="1649091794998" ? Explain.
d. Find an expression for the current I at time t. Graph I from to localid="1649091939933"
A battery with internal resistance r is connected to a load resistance R. If R is increased, does the terminal voltage of the battery increase, decrease, or stay the same? Explain.
A 50 mF capacitor that had been charged to 30 V is dis-charged through a resistor. FIGURE P28.70 shows the capacitor voltage as a function of time. What is the value of the resistance?
A 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?
What power is dissipated by the resistor in ?
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