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- A capacitor uses air as a dielectric and has a capacitance of 3 F. A dielectric material is inserted between the plates without changing the spacing, and the capacitance becomes 15 F. What is the dielectric constant of this material?A 15-F AC capacitor is connected in series with a 50 resistor. The capacitor has a voltage rating of 600 WVDC. The capacitor and resistor are connected to a 480-V, 60-Hz circuit. Is the voltage rating of the capacitor sufficient for this connection?In a pure capacitive circuit, does the current lead or lag the voltage?
- 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!1- What are the various factors which affect Dielectric Strength?
- Capacitor has the ability to store a quantity of a. Dynamic Electricity b. Dielectric c. Electric Flux O d. Static electricityEach of the conductor in a parallel-plate capacitor is calleda. dielectricb. insulatorc. platesd. terminalQUESTION 3 E-05, PC-05. While testing of capacitor with the Multimeter it will show value of? will indicate charge voltage. some resistane. Cwill indicate amount of current it has. QUESTION 4 E-05, PC-02. What are the factors affecting the capacitance of capacitor. Area of plates only. O Area of plates and Dielectric media. O Area of plate, dielectric and distance between plates.
- 8. Liquids with solid impurities a) Have higher dielectric strength b) Of large size have higher dielectric strength c) Have lower dielectric strength as compared to pure liquids d) None of the above 9. Peak to peak ripple is defined as a) the difference between average de voltage and peak value b) the difference between maximum and minimum de voltage c) the difference between maximum ac and average de voltages d) the difference between ac (rms) and average de voltages 10. In a Cockroft-Walton circuit, input voltage 100 kV load current 25 mA, supply frequency 100 Hz, each capacitor 10 nF. The optimum no. of stages for maximum output voltage is a) 1 b) 2 c) 10 d) 35How does the internal resistance of the multimeter (in voltage setting) affect the charging/discharging rate of the capacitor. Explain.The voltage sensitivities of Barium Titanate and Quartz are respectively 12 × 10-³ Vm/N and 15 × 10-3 Vm/N. Their respective permitivites are 12.5 × 10-⁹ F/m and 40.6 × 10-12 F/m. What are their charge sensitivites?