QUESTION 7. In the circuit shown below the capacitors are initially uncharged and the switch is open. A B 2 μF 20 V - 4 μF switch ww 6 ΜΩ 13 ΜΩ ww 5 ΜΩ a) If the switch is now moved to contact A, what is the charge on the 2.00-mF capacitor and the current through the 5.00 × 10° S resistor 10 seconds later?
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- You find that a 25-F capacitor connected to 480 VAC is defective. The storeroom has no capacitors with a 480-VAC rating. However, you find two capacitors rated at 50 F and 370 VAC. Can these two capacitors be connected in such a manner that they can replace the defective capacitor? If yes, explain how they are connected and why the capacitors will not be damaged by the lower voltage rating. If no, explain why they cannot be used without damaging the capacitor.A pure capacitive circuit is connected to a 480-volt, 60-Hz power source. An ammeter indicates a current flow of 24 amperes. The circuit current must be reduced to 16 amperes by connecting a second capacitor in series with the first. What is the value of the existing capacitor? What value capacitor should be connected in series with the original capacitor to limit the circuit current to 16 amperes?A postage stamp mica capacitor has the following color marks starting at the upper left dot: yellow, violet, brown, green, no color, and blue. What are the capacitance value, tolerance, and voltage rating of this capacitor?
- The symbol shown is a a. polarized capacitor. b. normally closed switch. c. normally open held closed switch. d. normally open contact.1. 1-5 K 30v a. what is tue T CTime constant) ? b. How long will it take for the capacutor TO rtach s0% op charge? C. What is tne voltage of capa citor apter 1 seconds? d. How many tíme constants will it take for the soltage to reach 23 v? C. Gweng that the capacitor is fully changed, how will it take por it to be 20% ? long 120v + BF what is the. T ? b. what is the voltage capacitor apter 10 sec? a. C. How many time constants will it take for Tue Vo Itage to reach 80 v.? d. Given that the capaator is Fully charged, how time constants will it be to reau many GOV!C) A 25 A electrodynamic ammeter is controlled by a spring having a constant of 5.7295x 10-6 Nm/rad. The full scale deflection is 110°. Determine the inductance of the instrument while measuring a current of 20 A. The mutual inductance at 0° deflection is 4 u H and the change in mutual inductance is linear with the deflection.
- Calculate the voltage at 1.5¹ (milliseconds) for the following RC Circuit. Assume switch is closed and capacitor is in a charge state. t=0 LE -10 V oto R1 1kQ C1 1uF1. A purely resistive circuit the current is leading by 90° with respect to voltage. 2. A purely inductive circuit the current is lag behind the voltage by 90°. 3. A purely capacitive circuit the current is lead by 90° with respect to the voltage. 4. A capacitor element stored magnetic energy. 5. An inductor element stored electrical energy. 6. Resistor elements consume power. 7. Angle between current and voltage is called power. 8. The power factor angle for a purely resistive is zero. 9. The power factor angle for a purely inductive load is -90°. 10. The power factor of a purely capacitive is leading.When the switch is closed in above circuit, what is the voltage on the inductor, resistor R1 and R2 after 2.2us , assuming 0 V on the inductor to start?
- A 470- uF capacitor is connected in series with a 120-k2 resistor. How long will it take the capacitor to charge completely?Two 10 uF capacitors have been connected in parallel across a 230 V 50 Hz AC supply. The current drawn from the supply will be approximately: Select one: a. 1.44 A b. 0.36 A c. 11.5 A O d. 23.0 AThe circuit in the figure below contains two resistors, R1 = 4.00kΩ and R2 = 5.00kΩ, and two capacitors, C1 = 4.00uF and C2 = 5.00uF, connected to a battery with emf E = 120V. If no charges exist on the capacitors before switch S is closed, determine the charge q1 on capacitor C1 1.00ms after the switch is closed. Determine the charge q2 on capacitor C2 1.00ms after the switch is closed.