Answer:
B. Northern Canada
Explanation:
A continental polar air mass can form over the land during the winter months. In the Northern Hemisphere, it originates in northern Canada or Alaska. As it moves southward, it brings dry weather conditions to the United States. Temperature and humidity levels are both low. Hope this helps :)
For a full wave bridge you don't want a center tap
Force on a moving charge is given by

Given that
q = 6.8 C

B = 1.4 T
angle = 15 degree


