Question 1

A conducting rod of length $$L$$ moves to the right with constant velocity $$v on U-$$shaped rails in a uniform magnetic field $$\vec{B}$$ directed into the page, as shown in the figure. What is the direction of the induced current in the loop?

Accepted Answer

Counterclockwise

Question 2

If the rod in the figure moves with velocity $$v = 5\ \mathrm{m/s}$$, the length of the rod is $$L = 0.2\ \mathrm{m}$$, and the magnetic field is $$B = 0.3\ \mathrm{T}$$, what is the magnitude of the induced EMF in the loop?

Accepted Answer

$$0.15\ \mathrm{V}$$

Question 3

If the resistance of the entire loop is $$R = 10\ \Omega$$, what is the magnitude of the induced current when the rod moves as shown?

Accepted Answer

$$0.015\ \mathrm{A}$$

Question 4

Which equation correctly describes the induced EMF ($$\varepsilon) in $$the moving rod?

Accepted Answer

$$\varepsilon = vLB$$

Question 5

If the velocity of the rod is doubled, what happens to the induced EMF?

Accepted Answer

It doubles

Question 6

If the magnetic field is reversed (now out of the page), what is the direction of the induced current?

Accepted Answer

Clockwise

Question 7

If the rod is stationary, what is the induced EMF in the loop?

Accepted Answer

$$0\ \mathrm{V}$$

Question 8

Which law explains the induced current in the moving rod scenario?

Accepted Answer

Faraday's Law of Induction

Question 9

If the resistance of the loop is decreased, what happens to the induced current?

Accepted Answer

It increases

Question 10

If the rod is moved to the left instead of the right, what is the direction of the induced current (with $$\vec{B}$$ into the page)?

Accepted Answer

Clockwise

Induced EMF and Magnetic Field in a Slide Wire Generator

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