What are the resistance, peak current, and power level of a computer monitor tha

Question

What are the resistance, peak current, and power level of a computer monitor that draws an rms current of 0.833 a when connected to a 120-V outlet? Find the rms and peak currents in a 40-W, 120-V lightbulb. What is its resistance? A 50-kW electric heater is designed to run using a 240-V ac source. Find its (a) peak current and (b) peak voltage, (c) How much energy will you be billed for in a 30-day month if it operates 2.0 h per day? The current in a resistor is given by I = (8.0 A) sin(40 pi t) when a voltage given by V = (60 V) sin(40 pi f) is applied to it. What is the resistance value? What are the frequency and period of the voltage source? What is the average power delivered to the resistor? The current and voltage outputs of an operating ac generator have Peak Values of 2.5 A and 16 V, respectively, What is the average power output of the generator? What is the effective resistance of the circuit it is in? The current in 60-Ohm resistor is given by I = (2.0 A) sin(380t). What is the frequency of the current?

Explanation / Answer

11)

given that vrms = 120 V

Power P = Vrms*Irms = 40 W

rms current is Irms = 40/vrms = 40 /120 = 0.33 A

maximum current Imax = sqrt(2)*Irms = 1.414*0.33 = 0.46662 A

resistance is R = Vrms/Irms = 120/0.33 = 363.63 ohm

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