February 20, 2017

Homework Help: physics

Posted by physics on Thursday, March 12, 2009 at 10:45pm.

which of the following modifications to a solenoid would be most likely to decrease the strength of its magnetic field?
a. removing its iron rod core and increasing the number of coils
b. increasing the current and reducing the number of coils
c. reducing the number of coils and inserting an iron core
d. decreasing the current and reducing the number of coils


A stationary positive charge, Q, is located in a magnetic field, B, which is directed toward the right. What is the direction of the magnetic force on Q?
a. toward the right
b. up
c. down
d. there is no magnetic force


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