A series circuit consisting of a variable resistor in series with a capacitance of 80 microfarad is connected across a 120 V, 50 Hz supply. To what value should R is adjusted so that the power absorbed by the series circuit will be 100 W?

A series circuit consisting of a variable resistor in series with a capacitance of 80 microfarad is connected across a 120 V, 50 Hz supply. To what value should R is adjusted so that the power absorbed by the series circuit will be 100 W?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter26: Three-phase Circuits

Section: Chapter Questions

Problem 3PA: You are an electrician working in an industrial plant. A 30-hp three-phase induction motor has a...

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Wheatstone Bridge Method

A Wheatstone bridge is a circuit used to measure unknown resistance by measuring the ratios of the two branches of the circuit such that each branch has two resistance and out of four resistance one is unknown. The two branches are joined in between with the help of galvanometer which is used to determine the direction of the current. The main advantage of this circuit is that it can provide the most accurate measurement (different from a simple voltage separator).

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A series circuit consisting of a variable resistor in series with a capacitance of 80 microfarad
is connected across a 120 V, 50 Hz supply. To what value should R is adjusted so that the
power absorbed by the series circuit will be 100 W?

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