If we monitor a point on a wire where there is a current for a certain time interval, which gives the charge that moves through the point in that interval?

a. the product of the current and the time interval
b. the ratio of the current to the time interval
c. the ratio of the time interval to the current

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b. b. at twice the distance, the magnitude of the field is 2b. c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.