A) A 5-kilo-ohm resistor is in an AC circuit that has a frequency of 50 Hz. If the peak voltage is 110 V what is the voltage across the resistor after 3 ms? (assume a sine wave with zero phase) B) Calculate the average power that is wasted by this resistor.
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- The voltage supplied to an ac circuit is given by v = (120 sin(60t))V. What are the rms voltage and the frequency? a) 120 V, 60 Hz b) 120 V, 380 Hz c) 170 V, 9.5 Hz d) 85 V, 9.5 Hz e) 240 V, 30 HzA 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 UnitsA) 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
- In the figure below, a series RLC circuit of an inductance of 0.05 H, a capacitance of 1000 µF and a resistance of 10 ohms is tuned to resonance by connecting it across a variable frequency AC supply. The current and XC and XL vs. frequency of this circuit are plotted, see below. 10 Voits 0.0S H 0.0424A Cuurent vs. Frequency 1.2 1 0.8 0.4 0.2 100 12 Frequency Current vs. XL and Xc 180 160 . 140 120 OXL xC 100 80 . 60 40 20 ..... O 10 20 30 40 s0 0 70 80 90 100 110 Frequency (Hz) Answer these questions: 1- Determine the resonant frequency of this circuit and the amplitude of the current at resonance. 2- Which region does the circuit reactance is capacitive and which is inductive?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 figure shows the voltage across, and the current through, a resistor that is connected to an AC voltage source. (a) Find the resistance and the average power dissipated by the resistor. (b) How many times per second does the power dissipated by the resistor reach its maximum value? (c) Draw a graph of the power dissipated by the resistor versus time, and a graph of the power dissipated by the resistor versus voltage across the resistor..