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In this lesson, we will learn how to use Faraday's law and Lenz's law to calculate the emf induced in a conductor that is moving within a magnetic field.

Q1:

An automobile with a radio antenna 1.0 m long travels at 100.0 km/h in a location where the Earthβs horizontal magnetic field is 5 . 5 Γ 1 0 β 5 T. What is the maximum possible emf induced in the antenna due to this motion?

Q2:

The rod shown in the diagram moves to the right on negligible-resistance rails at a speed of π£ = 3 . 0 / m s . If π΅ = 0 . 7 5 T everywhere in the region of the rails, what is the current through the 5.0 Ξ© resistor?

Q3:

A 25-cm rod moves at 5.0 m/s in a plane perpendicular to a magnetic field of strength 0.25 T. The rod, velocity vector, and magnetic field vector are mutually perpendicular, as indicated in the accompanying figure.

Calculate the magnetic force on an electron in the rod.

Calculate the electric field in the rod.

Calculate the potential difference between the ends of the rod.

What would be the speed of the rod if the potential difference between the ends of the rod was 1.0 V?

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