A co-axial cylindrical capacitor shown in Figure (i) has dielectric with relative permittivity ₁₁ = 2. When one-fourth portion of the dielectric is replaced with another dielectric of relative permittivity E₁2, as shown in Figure (ii), the capacitance is doubled. The value of 2 is r R Er1=2 R &r=2 82

Q: As discussed in your reading material, the MAIN reason for calculating a capacitance value is to…

A: (i) The main reason for calculating capacitance value is to improve power factor  (ii)  Most…

Q: A capacitor is connected across an AC source. Suppose the capacitance of the capacitor is reduced by…

A: A capacitor is connected across an AC source. Suppose the capacitance of the capacitor is reduced by…

Q: At 0-, no currrent flows through the capacitors because they are open, how did you combine the…

A:

Q: Calculate the capacitance of a capacitor that is charged to 106 W-s by 3.8 A-s source. C =

A:

Q: 10. What is the result of decreasing the capacitance of a capacitor? A. Decreased capacitive…

A: In this question we need to select a correct option

Q: A 20-µF (C1) and a 40-µF (C2) capacitor are connected in parallel to a 480-V, 60-Hz source. What is…

A: Given: C1=20 μFC2=40 μFV=480 Vf=60 Hz C1 and C2 are in parallel to V

Q: Find the equivalent inductance as seen from the terminals shown in the figure

A: In this question we will find equivalent inductance between terminals...

Q: Design a circuit to limit a 20 V rms sinusoidal voltage to a maximum positive amplitude of 10 V and…

A: Clipper Circuits:- A clipper circuit is used to clip the input voltage at a fixed higher and lower…

Q: What symbol is under t for voltage across capacitor and = RC?

A: The symbol tau (ζ) represents time constant of the system. Time constant is defined for charging and…

Q: Let's say you measure t1/2 to be 0.037  seconds and the resistance in the circuit is 68  Ohms. Then…

A: The half time, The resistance,

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.