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An electric kettle is rated at 1300 W (average power) at 110 V (rms voltage). The rms current is:
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10.4 A
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11.8 A
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12.5 A
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13.2 A
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- Calculate the resistance for an electric kettle rated at an average power of 2400 W and at an rms voltage of 120 V. 2 Ω 4 Ω 6 Ω 7 ΩDetermine the output voltage Vo V₁ = 1.5 V 20 k m 100 k wThe figure below shows three lightbulbs connected to a 120-V AC (rms) household supply voltage. Bulbs 1 and 2 have a power rating of 75 W, and bulb 3 has a 40-W rating. 120 V 1 2 3 (a) Find the rms current in each bulb. Ibulb 1 = A Ibulb 2 = A Ibulb 3 = A (b) Find the resistance of each bulb. Ω Rbulb 1 = Rbulb 2 = Ω Rbulb 3 2 i (c) What is the total resistance of the combination of the three lightbulbs? Ω
- 22. An a.c has a peak value of V. The rms current in a light bulb of power P is A D EAt its highest temperature, a space heater has a resistance of 25.5 Q when it is plugged into a wall outlet that supplies a peak voltage of 162.6 V sinusoidally at 60 Hz. What is the average power output P of the space heater? P = WThe figure below shows three lightbulbs connected to a 120-V AC (rms) household supply voltage. Bulbs 1 and 2 have a power rating of 45 W, and bulb 3 has a 100-W rating. 120 V 1 2 3 (a) Find the rms current in each bulb. Ibulb 1 A = Ibulb 2 = A Ibulb 3 = A (b) Find the resistance of each bulb. Ω = 1 R bulb Rbulb 2 = Ω Rbulb 3 Ω = (c) What is the total resistance of the combination of the three lightbulbs? Ω Need Help? Read It
- Sinusoidal (ac) voltage and current are measured in a resistive circuit. The peak voltage, Vė, is measured to be 110 V. The peak current, lō, is measured to be 7.0 A. What is the rms voltage? Vrms volts (rms) What is the rms current? Irms amperes (rms) What is the average power consumption rate in this circuit? Pave WThe rms current in a 50-Ω resistor is 0.42 A. What is the peak value of the voltage across this resistor?The V vs t graph shown below is for the capacitor of an RC circuit. V (V) 16 12. 8. 4. 15. Second graph The Q vs t graph shown below is for the capacitor of an RC circuit. Q (C) 20 10. 9 18 27 36 45 54 63 72 81 90 5. 0.5 1. 1.5 2. t(s) 2.5 t(s) Determine the time constant of the RC circuit. T = 5.92136 s X If C = 10 F, determine R. R = 52 In this case, was the capacitor charging or discharging? ---Select--- Determine the time constant of the RC circuit. T = If C = 4 F, determine R. R = | 12 In this case, was the capacitor charging or discharging? ---Select---
- A 120-V rms voltage is applied across a 6.0-µF capacitor and a series combination of a 100-2 resistor. If the frequency of the power source is 60 Hz, what is the rms value of the current in the circuit? O 0.76 A O 0.46 A O 0.56 A O 0.26 A O 0.36 AA resistor dissipates 2.00 W when the rms voltage of the emf is 10.0 V. At what rms voltage will the resistor dissipate 10.0 W?The rms current through a 10 kΩ resistor is 5 mA. What is the rms voltage drop across the resistor?