a) Old incandescent lightbulbs have a purely resistive metal filament, through which flows an alternating current. If an incandescent bulb uses an average power of 60.0 W when connected to a 60.0 Hz power source having a maximum voltage of 170 V, what is its resistance (in Ω)? Ω (b) Another incandescent bulb, with an average power usage of 75.0 W, is connected to the same AC power source, with the same frequency and maximum voltage. What is its resistance (in Ω)? Ω

(a) What is the resistance of a lightbulb that uses an average power of 85.0 W when connected to a 60.0 Hz power source having a maximum voltage of 190 V? Ω (b) What is the resistance of a 110 W bulb? Ω

A 2.04 kN resistor is connected to an AC voltage source with an rms voltage of 230 V. HINT (a) What is the maximum potential difference across the resistor (in V)? V (b) What is the maximum current through the resistor (in A)? A (c) What is the rms current through the resistor (in A)? A (d) What is the average power dissipated by the resistor (in W)?

A circuit consists of a 40 Ω resistor and a690 mH inductor connected in series to a 14 Vbattery. What is the value of the current when thecurrent is increasing at the rate of 7 A/s?Answer in units of A

You decide to “go green" and use an exercise bike to power your home appliances. Assume that your exercise bike is rigged to generate electrical power with 60% efficiency. In other words, only 6/10 of the power you develop can be used to store electrical energy for later use. Consider your 3500-Watt central AC unit. You need to run this unit for 4 hours each day during the summer. If you can develop a sustained power of 300 Watts on your exercise bike, how long would you have to work out just to keep the AC running on a summer day?

The figure below shows three lightbulbs connected to a 120-V AC (rms) household supply voltage. Bulbs 1 and 2 have a power rating of 100 W, and bulb 3 has a 120-W rating. 120 V 1 2 3 (a) Find the rms current in each bulb. Ipulb 1 = A Ibulb 2 = A Ipulb 3 = A (b) Find the resistance of each bulb. Rbulb 1 = Ω Rpulb 2 = Ω Rpulb 3 = Ω (c) What is the total resistance of the combination of the three lightbulbs?

(a) What is the maximum current in a 5.30-μF capacitor when it is connected across a North American electrical outlet having AVrms = 120 V and f = 60.0 Hz? MA (b) What is the maximum current in a 5.30-μF capacitor when it is connected across a European electrical outlet having AVms = 240 V and f = 50.0 Hz? Need Help? MA Read It Watch It