a) A conducting metal bar moving in a magnetic field "completes the circuit" as shown below, and acts as an emf source for the circuit. If the resistive element is a 25-W household light bulb with an electrical resistance of 575 N, how fast would the bar have to move to make the bulb shine at its full brightness if l=20cm and the magnetic field strength is 0.50 T? M R F. m х х х х х b) Is this an effective way to light a light bulb? c) If the velocity was 1/10 that calculated in part A, how much power would be dissipated by the bulb? d) What direction will the current travel, clockwise or counter-clockwise and why? P.

a) A conducting metal bar moving in a magnetic field "completes the circuit" as shown below, and acts as an emf source for the circuit. If the resistive element is a 25-W household light bulb with an electrical resistance of 575 N, how fast would the bar have to move to make the bulb shine at its full brightness if l=20cm and the magnetic field strength is 0.50 T? M R F. m х х х х х b) Is this an effective way to light a light bulb? c) If the velocity was 1/10 that calculated in part A, how much power would be dissipated by the bulb? d) What direction will the current travel, clockwise or counter-clockwise and why? P.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter26: Electromagnetism

Section26.1: Interactions Of Electric And Manetic Fields And Matter

Problem 2PP

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