An ac circuit is shown in the figure. The rms current in the circuit is measured to be 1.8 A. What is the capacitance of the capacitor? R = 40 Ω Xc = 100 Ω L = 180 mH X₁ = 80 Q

A capacitor is connected across the terminals of an ac generator that has a frequency of 490 Hz and supplies a voltage of 39 V. When a second capacitor is connected in parallel with the first one, the current from the generator increases by 0.18 A. Find the capacitance of the second capacitor. Note: The ac current and voltage are rms values and power is an average value unless indicated otherwise. Number 1 a pag Jadi Units

A) 0.82 MU B) 0.3 fe 66. A 35-µF capacitor is connected to an ac source of emf with a frequency of 250 Hz and a maximum emf of 20 V. If the voltage across the capacitor is zero at time = 0, what is the voltage at time = 3.0 ms? Assume the phase constant is zero. A)-20 V B)-10 V C) 0 V D) 10 V E) 20 V 75. An electron in a hydrogen atom moves in a circle of radius 1.1 x 10-10 m at a speed of about 1.6 x 106 m/s. What is the magnetic dipole moment of this electron due to its orbital motion? A) 9.3 x 10-24 J/T B) 1.4 x 10-23 J/T C) 1.9 x 10-23 J/T D) 2.8 x 10-23 J/T

A 2.6-k resistor and a 4.0-μF capacitor are connected in series to an ac source. Part A Calculate the impedance of the circuit if the source frequency is 55 Hz. Express your answer to two significant figures and include the appropriate units. Z = Submit Part B Z = 0 Submit Value Request Answer Calculate the impedance of the circuit if the source frequency is 10000 Hz. Express your answer to two significant figures and include the appropriate units. Value Units Request Answer 2 Units ?

The capacitance in a series RCL circuit is C₁ = 3.6 μF, and the corresponding resonant frequency is fo1 = 7.8 kHz. The generator frequency is 3.9 kHz. What is the value of the capacitance C₂ that should be added to the circuit so that the circuit will have a resonant frequency that matches the generator frequency? C₂ = i

An AC voltage source produces an average power of 400mW in a circuit with a total resistance of 12.5 kohms.    What is the RMS voltage of the AC voltage source?