2. Near San Francisco, where the vertically downward component of the earth�s magnetic field is 4.8 x 10-5 T, a car is traveling forward at 25 m/s. The width of the car is 2.0 m. (a) Find the emf induced between the two sides of the car. (b) Which side of the car is positive�the driver�s side or the passenger�s side?

Induced emf is found by

 

 

Using force law

 

The force will push positive charges toward the driver�s side!

 

the driver�s side is more Positive!

 

 

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This page last updated on June 23, 2018