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A 0.20-uF capacitor is to be charged through a resistor so that it becomes 63 percent charged in 0.10 s. What should the resistance of the capacitor be? (b) What is the time constant if the capacitor is charged through a 20-MΩ resistor?

Equation P = I2R Seems to suggest that rate of increase of internal energy in a resistor is reduced, if the resistance is made less. Equation P = V2/R seams to suggest just the opposite. How do you reconcile this apparent paradox?

AR = 40 N resistor has a power rating of 10 W. This means that if the electrical power deliv- %3D ered to this resistor exceeds 10 J/s, the resistor will burn up and be destroyed. (a) Determine the maximum potential difference that can be applied across this resistor. (b) Determine the maximum current that can be safely sent through this resistor. (c) Such a resistor that burns up is known as a fuse. Any fuse always carries a rating label on it and electricians always know the rating of a fuse before using it. Determine the rating label on this fuse. A 9:19 AM P Type here to search 9396 93% 4/5/2021 ダー F10 *** Prise Insert Delete F3 FS F7 FO F11 F12 23 & Backspace 4 8 %3D E R T Y U PI D 11 F C B N A PgU- Alt Alt Ctrl Home V

Three wires, of the same diameter, are connected in turn between two points maintained at a constant potential difference. Their resistivities and lengths are r and L (wire A), 1.2r and 1.2L (wire B), and 0.9r and L (wire C). Rank the wires according to the rate at which energy is transferred to thermal energy within them, greatest first.

Please answer carefully.

Prove that when n identical resistors of resistance R are connected in parallel the equivalent resistance is R/n.

A 2.00-nF capacitor with an initial charge of 5.30 μC is discharged through a 1.19-kn resistor. (a) Calculate the magnitude of the current in the resistor 9.00 us after the resistor is connected across the terminals of the capacitor. 50.74 mA (b) What charge remains on the capacitor after 8.00 µs? 1.8e-7 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. μC (c) What is the maximum current in the resistor? 2.2269 A Need Help? Read It Watch It

A person shuffling across a dry carpet can be approximately modeled as a charged 100-pF capacitance with one end grounded. If the person touches a grounded metallic object such asa water faucet, the capacitance is discharged and the person experiences a brief shock.Typically, the capacitance may be charged to 20,000 V and the resistance (mainly of one’sfinger) is 100 Ω. Determine the peak current during discharge and the time constant of theshock

A 120 V potential difference is applied to a space heater that dissipates 500 W during operation. (a) What is its resistance during operation? (b) At what rate do electrons flow through any cross section of the heater element?