Consider a battery, e.m.f.= V 0 attached to two conducting frictionless rails th

Question

Consider a battery, e.m.f.= V0 attached to two conducting frictionless rails that are a distance l apart. There is a magnetic field B perpendicular to the rails (out of the page), and a conducting bar can slide over the rails perpendicular to them as well as the field, as shown in the diagram below. (Note, assume that any field effects from the battery are negligible.) The bar is placed on the rails, starts from rest, and accelerates.

Part A) Consider the situation as described and select T or F for each of the following statments.

(T/F)

-The bar will accelerate away from the battery

-The direction of the induced e.m.f in the bar will be up

-Faraday's Law is such that changing magnetic fields generate electric fields

-Lenz's Law is such that induced currents produce magnetic fields that tend to magnify the flux changes that induce those currents

-If the magnetic field were reversed, the bar would accelerate towards the battery

This has been answered on chegg but all available answers are incorrect it seems. A valid answer would serve us well. Thank you

Explanation / Answer

-The bar will accelerate away from the battery- true

-The direction of the induced e.m.f in the bar will be up- true

-Faraday's Law is such that changing magnetic fields generate electric fields-true

-Lenz's Law is such that induced currents produce magnetic fields that tend to magnify the flux changes that induce those currents- false

-If the magnetic field were reversed, the bar would accelerate towards the battery.-true

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