13.3 Motional Emf

Emf across a rod sliding along rails as field times length times speed, the force needed to keep it moving, and rail guns and space tethers.

University Physics Volume 2, 13.3 Motional Emf

Status

FlagsLoading your progress…

4 exercises

13.3 Exercise 2

A rod of length 10 cm moves at a speed of 10 m/s perpendicularly through a 1.5-T magnetic field. What is the potential difference between the ends of the rod?

2.5

13.3 Exercise 4

Around the geographic North Pole (or magnetic South Pole), Earth’s magnetic field is almost vertical. If an airplane is flying northward in this region, which side of the wing is positively charged and which is negatively charged?

2.5

13.3 Exercise 6

An automobile with a radio antenna 1.0 m long travels at 100.0 km/h in a location where the Earth’s horizontal magnetic field is $5.5 \times 10^{− 5} \text{T} .$ What is the maximum possible emf induced in the antenna due to this motion?

2.5

13.3 Exercise 8

Suppose the magnetic field of the preceding problem oscillates with time according to $B = B_{0} \text{sin} \omega t .$ What then is the emf induced in the loop when its trailing side is a distance d from the right edge of the magnetic field region?

2.5