Multiple Choice
The magnetic field at any point is given by where
is the position vector of the point and A is a constant. The net current through a circle of radius R, in the xy plane and centered at the origin is given by:
A) AR2/ 0
B) 2 AR/ 0
C) 4 AR3/3 0
D) 2 AR2/ 0
E) AR2/2 0
Correct Answer:

Verified
Correct Answer:
Verified
Q1: A toroid with a square cross section
Q9: The magnetic field a distance 2 cm
Q10: Two long parallel straight wires carry equal
Q12: Which graph correctly gives the magnitude of
Q15: In Ampere's law, <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB3976/.jpg" alt="In Ampere's
Q17: In the figure, the current element <img
Q21: Solenoid 2 has twice the radius and
Q21: The diagram shows three arrangements of circular
Q29: A "coulomb" is:<br>A) one ampere per second<br>B)
Q37: Two long ideal solenoids (with radii 20