3) A current carrying wire is wrapped around cardboard tube as shown below. In which direction does the magnetic field point inside the tube? left right dn down out of the screen into the screen 1) An infinitely long hollow conducting tube carries current I in the direction shown. I х х х B? What is the direction of the magnetic field inside the tube? clockwise counterclockwise radially inward to the center radially outward from the center )the magnetic field is zero

1. At each of the four labeled points (A-D), sketch a vector representing the magnetic field around the bar magnet. 2. A second bar magnet identical to the first one is placed to the left of point A. (See figure below.) At each of the four labeled points (A-D'), sketch a vector representing the net magnetic field. D' 3. Rank the magnitude of the magnetic field at points A, B, A', and B'. If the magnitude of the magnetic field at any point is zero, state that explicitly. Explain your reasoning. (If you do not have enough information to determine the ranking, explain what information you would need.)

Magnetic fields are produced by magnets in much the same way that electric fields are produced by electric charges. True False

A long straight wire carries current to the right as shown. Point P is 1.0 cm away from the wire as shown. What is the direction of the magnetic field at P? to the left     to the right     down     up     out of the page     none of the given     into the page

Pr2. A very long, straight current-carrying wire is bent at the middle two different ways, so that it takes the shapes depicted in figures a) and b). Find the direction and magnitude of the magnetic field in both cases at the center C of the semicircle (of radius R= 10 cm), if the current flowing in the wire is I = 2 A. а) b) C.

3 - In a region the electric field is given as E = V(x2y/3), find the charge density p and the magnetic field B?

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