A train with a long steel axle is moving castwards. Which of the following statements is / are true about this train? 1) An emf is induced across the axle, which is proportional to the velocity of the train; 2) The vertical component of the earth's magnetic field contributes to the voltage induced across the axle; 3) There is no induced current in the axle of the train.

A train with a long steel axle is moving castwards. Which of the following statements is / are true about this train? 1) An emf is induced across the axle, which is proportional to the velocity of the train; 2) The vertical component of the earth's magnetic field contributes to the voltage induced across the axle; 3) There is no induced current in the axle of the train.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.

Question

A train with a long steel axle is moving
castwards. Which of the following statements
is / are true about this train?
1) An emf is induced across the axle, which
is proportional to the velocity of the train;
2) The vertical component of the earth's
magnetic field contributes to the voltage
induced across the axle;
3) There is no induced current in the axle of
40.
the train.

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