A slide-wire potentiometer has a battery of 4 Volt and negligible internal resistance. The resistance of slide wire is 100 n and its length is 200 cm. A standard cell of 1.018 Volt is used for standardizing the potentiometer and the rheostat is adjusted so that balance is obtained when the sliding contact is at 101.8 cm. The working current is 20 mA 30 mA 10 mA 40 mA

A slide-wire potentiometer has a battery of 4 Volt and negligible internal resistance. The resistance of slide wire is 100 n and its length is 200 cm. A standard cell of 1.018 Volt is used for standardizing the potentiometer and the rheostat is adjusted so that balance is obtained when the sliding contact is at 101.8 cm. The working current is 20 mA 30 mA 10 mA 40 mA

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter7: Luminaires, Ballasts, And Lamps

Section: Chapter Questions

Problem 15R: A good rule-of-thumb to estimate the expected life of a motor, a ballast, or other electrical...

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