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- Some surgery is performed with high-voltage electricity passing from a metal scalpel through the tissue being cut. Considering the nature of electric fields at the surface of conductors, why would you expect most of the current to flow from the sharp edge of the scalpel? Do you think high- or low-frequency AC is used?The capacitive reactance of the capacitor is more if: O a. capacitance is more and frequency of supply is less O b. capacitance is less and frequency of supply is less O .capacitance is more and frequency of supply is more O d. capacitance is less and frequency of supply is moreThe capacitive reactance of the capacitor is more if: O a. capacitance is more and frequency of supply is more O b. capacitance is more and frequency of supply is less O c capacitance is less and frequency of supply is less O d. capacitance is less and frequency of supply is more Previous page
- Why does the capacitor resist low-frequency signals more than high-frequency ones?ELECTRICAL PROPERTIES OF AGRICULTURAL AND BIOLOGICAL MATERIALS Discuss the following electrical properties of fresh produce (e.g. fruits andvegetables): 1.) Complex impedance propertiesa. Dielectric properties: Dielectric constant & Dielectric loss factorWhat type of energy is stored up in a capacitor? in a storage cell? in an inductive circuit? Why are capacitors not used in place of secondary batteries for the storage of electric energy?
- Design an Electrical network circuit transfer function that can be used by Radio Receiver and Television sets for tuning to select a narrow frequency range from ambient radio waves. Give the derivation of the transfer function.Discuss the following electrical properties of fresh produce (e.g. fruits andvegetables):a. Reaction to electromagnetic radiationb. Complex impedance properties i. Impedance ii. Dielectric properties *Dielectric constant *Dielectric loss factorC2 (ii). A sinusoidal waveform is displayed on a C.R.O. screen, the time/cm switch is on 20 us/cm and the volt/cm switch is on 50 V/cm. The width of one complete cycle is 3.4 cm and the peak to peak distance is 5.6 cm. Determine the following: The frequency is The magnitude of the sine voltage is The amplitude is
- Why does a capacitor act as a short circuit at high frequencies and as an open circuit at low frequencies?Why does a capacitor act as a short circuit at high frequencies?In a pure A.C capacitive circuit O Current lags the voltage ,by a phase angle of 30 deg O Current leads the voltage, by a phase angle of 90 deg O Current leads the voltage, by a phase angle of 30 deg O Current lags the voltage ,by a phase angle of 120 deg
