A light bulb is connected to a 60-V wall socket. The current in the bulb depends on the time t according to the relation I = (2.121 A) sin[(628.0 Hz)t]. (a) What is the frequency of the alternating current? 100 Hz (b) Determine the resistance of the bulb's filament? 75.66 (c) What is the average power delivered to the light bulb? 47.58 X W
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A light bulb is connected to a 60-V wall socket. The current in the bulb depends on the time t according to the relation
I = (2.121 A) sin[(628.0 Hz)t].
(a) What is the frequency of the alternating current?
100
Hz
(b) Determine the resistance of the bulb's filament?
75.66
(c) What is the average power delivered to the light bulb?
47.58
X W
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- A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation 1 = (0.840 A) sin [(432 rad/s)t]. (a) What is the frequency of the alternating current? (b) Determine the resistance of the bulb's filament. (c) What is the average power delivered to the light bulb? (a) Number i (b) Number i (c) Number i Units Units UnitsThe resistance of each brake lightbulb on an automobile is 7.9 Ω. Use the fact that cars have 12-V electrical systems to compute the current that flows in each bulb if they are connected in series. (For simplicity, assume that the circuit is only composed of one brake lightbulb and the car battery.)Consider the circuit shown below. (a)Determine the equivalent resistance and the current from the battery with switch ?1 open. (b) Determine the equivalent resistance and the current from the battery with switch ?1closed.
- The resistance of each brake lightbulb on an automobile is 6.7 Ω. Use the fact that cars have 12-V electrical systems to compute the current that flows in each bulb if they are connected in series. (For simplicity, assume that the circuit is only composed of one brake lightbulb and the car battery.)A 215-KV power transmission line carrying 500 A is hung from grounded metal towers by ceramic insulators, each having a 1.10 x 10 resistance. (a) What is the resistance to ground of 50 of these insulators? (Assume the insulators are connected in parallel.) 2.267 Q (b) Calculate the power dissipated by 50 of them. X What is the voltage across the effective resistance? How can you find the power from the voltage and the resistance? W (c) What fraction of the power carried by the line is this? P x Protal What is the total power carried by the line?A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation / = (0.512 A) sin [(293 rad/s)t]. (a) What is the frequency of the alternating current? (b) Determine the resistance of the bulb's filament. (c) What is the average power delivered to the light bulb? (a) Number (b) Number (c) Number i Units Units Units ◄►
- A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation / = (0.653 A) sin [(262 rad/s)t]. (a) What is the frequency of the alternating current? (b) Determine the resistance of the bulb's filament. (c) What is the average power delivered to the light bulb? (a) Number (c) Number i - pul (b) Number i i Units Units UnitsAll electric devices are required to have identifying plates that specify their electrical characteristics. The plate on a certain steam iron states that the iron carries a current of 6.00 A when connected to a source of 1.20 X 102 V. What is the resistance of the steam iron? (a) 0.050 0 Ω. (b) 20.0 Ω. (c) 36.0 Ω.