Question

Problem 23. A positive test charge qtest is placed at rest equidistance between the north and south poles of two identical bar magnets (see figure). What is the net force on the charge from the two magnetic poles? Suppose the magnetic strength of one of the two bar magnets is doubled, what is the net force on the charge from the two magnetic poles now?

The magnetic field of a current-carrying wire Problem 24. Consider a current-carrying wire running along the z-axis. The figure below shows a top view of the current-carrying wire looking downward on the xy-plane in the direction of the negative z-axis with the current running in the direction out of the page (in the positive z-direction). Identify the magnetic field lines associated with the wire at the points along the positive and negative x-and y-axes: (±1,0),(0,±1). How are these magnetic field lines related to one another?

charge from the tuo magasth polet Suppoee the mag otie strength of ose of the two bar ages is doubled, whot is the et force on the change from the ewo magrtie poles

Answer 1