Two identical circular loops of wire, perpendicular to the page, carry the same conventional current I.   Choose from the following possible directions to answer the question below: What is a possible direction (a – g) of the magnetic field due to the loops at location P, which is midway between the loops?

An electron and a proton, both with the same initial velocity, v, enter a region with a uniform magnetic field B out of the page, as shown. Each one undergoes semi-circular motion in the field and exits the field some distance d from the entry point. (The diagram shows the path for just one of the two particles.) Consider the following two statements and decide if they are true or false. i) The particle shown in the picture must be the negative one (the electron). ii) The distance "d" for the proton will be greater than "d " for the electron. В d. (shot with same v) i is true, but ii is false Both i and ii are false i is false, but ii is true Both i and ii are true

A loop of wire in the shape of a rectangle of width w and length L and a long, straight wire carrying a current I lie on a tabletop as shown in the figure below. (a) Determine the magnetic flux through the loop due to the current I. (Use any variable stated above along with the following as necessary: H. and r.) (b) Suppose the current is changing with time according to I = a + bt, where a and b are constants. Determine the magnitude of the emf that is induced in the loop if b = 17.0 A/s, h = 1.00 cm, w = 19.0 cm, and L = 1.25 m. V (c) What is the direction of the induced current in the rectangle? O clockwise O counterclockwise O The magnitude is zero.

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Determine the direction of the magnetic field lines produced by the following current-carrying straight conductors. Provide a brief explanation of your answer. (Which RHR was used, etc...) Determine the direction of conventional current flow in the following diagrams where magnetic field lines are indicated by an arrow, a dot, or an "x" depending on their direction. Provide a justification for your choice. C Solution: 00000 Determine the direction of the magnetic field produced by the current flowing in the following solenoids, by labelling the magnetic poles in the correct locations. Be sure to note subtle changes in the direction of the coil windings and the cell orientation. Provide a justification for your choice. S Solution: N Solution: Determine the orientation of the battery cell in the following solenoids such that the current produces the magnetic field shown. Provide a justification for your choice. Solution: C Solution: Z S Solution: ✓ Solution: Solution:

An aluminum rod with a mass m slides on parallel horizontal brass rails, a distance L apart, and carries a current of I. The coefficient of kinetic friction between the rod and rails is ?. What vertical, uniform magnetic field is needed to keep the rod moving at a constant speed? (Enter the magnitude. Use any variable or symbol stated above along with the following as necessary: g.)

Uniform magnetic field points perpendicular out of the page. A wire carrying current I is placed in the magnetic field. What is the direction of magnetic force on electron #1 moving in the direction of the arrow next to it?