A circuit shown in the figure contains a lightbulb which has a resistance of 16 0. The lightbulb consumes 4.0 W of power. A 1.6 m long bar moves to the left with a constant speed of 2.0 m/s. How much external force is needed to maintain the rod at constant speed?

A circuit shown in the figure contains a lightbulb which has a resistance of 16 0. The lightbulb consumes 4.0 W of power. A 1.6 m long bar moves to the left with a constant speed of 2.0 m/s. How much external force is needed to maintain the rod at constant speed?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter29: Dc Generators

Section: Chapter Questions

Problem 1PA: You are working as an electrician in a large steel manufacturing plant, and you are in the process...

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Concept explainers

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.

Question

A circuit shown in the figure contains a lightbulb which has a resistance
of 16 0. The lightbulb consumes 4.0 W of power. A 1.6 m long bar moves
to the left with a constant speed of 2.0 m/s. How much external force is
needed to maintain the rod at constant speed?
B
R
-F
external
2.4 N
2.8 N
3.2 N
O 2.0 N
O 1.6 N

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