. In the circuit shown in Fig. 19–79, the 33-N resistor dissi- pates 0.80 W. What is the battery voltage? 68 Ω 33 Ω FIGURE 19–79 85 2 Problem 81.
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- The ignition circuit of an automobile is powered by a 12-V battery. How are we able generate large voltages with this power source?Check Your Understanding The voltage supplied to your house varies as V( t )= V max sin( 2ft ) If a resistor is connected across this voltage, will Ohm’s law V = IR still be valid?Refer to Figure 10.17 and the discussion of lights dimming when a heavy appliance comes on. (a) Given the voltage source is 120 V, the wire resistance is 0.800 and the bulb is nominally 75.0 W, what power will the bulb dissipate if a total of 15.0 A passes through the wires when the motor comes on? Assume negligible change in bulb resistance, (b) What power is consumed by the motor?
- When the switch shown in Fig. 19–45 is closed, what willhappen to the voltage across resistor R1 It will(a) increase. (b) decrease. (c) stay the sameSuppose E = 10.0 V, R1 = 180 ohms, and R2 = 350 ohms. See attached. What value of R3 do we select so the battery supplies 24mA? I think first we convert latter, then.... (III) What would the current be in Fig. 19–61 if the 12- Ωresistor is shorted out (resistance= 0 )? Let = 0 r = 1.0 Ω .
- Can a copper wire and an aluminum wire of the samelength have the same resistance? Explainthe battery shown in the circuit in Figure 19.46 has no internal resistance. After you close the switch, the brightness of bulb B1 willA. increase. B. decrease. C. remain the same.(only 1 option is correct)A close inspection of an electric circuit reveals thata 480 ohm resistor was inadvertently soldered in the placewhere a 350 ohm resistor is needed. How can this be fixedwithout removing anything from the existing circuit?
- Just curious as to how they got 292 ohms in the first part of the problem. Thanks.Hi, here's my question. 26.60: In the figure, find the emf e in order for the current through the 7.00 W resistor to be 18.0 A. Each emf source has negligible internal resistance.A person notices a mild shock if the current along apath through the thumb and index finger exceeds 80. µA. Compare the maximum possible voltage without shock acrossthe thumb and index finger with a dry - skin resistance of 4.0 x105 Ω and a wet - skin resistance of 2.0 kΩ.