Which of the following statements best describes Oersted’s Principle ? a. A current carrying conductor produces a linear magnetic field from the north to the south pole b. A current carrying conductor creates a circular magnetic field around a wire c. A solenoid will create a magnetic field similar to that of a bar magnet d. A charge entering a magnetic field will undergo circular motion e. None of the above explain Oersted’s Principle

1.  A DC power line for a light-rail system carries 950 A at an angle of 33° to the Earth’s 5.00 × 10-5 T magnetic field. What is the magnitude of the force (in N) on a 125 m section of this line?  2. Consider a 150 turn square loop of wire 15.5 cm on a side that carries a 56 A current in a 1.6 T field. What is the maximum torque on the loop of wire in N⋅m?  What is the magnitude of the torque in N⋅m when the angle between the field and the normal to the plane of the loop θ is 14°?  3.  Consider two two long, straight, parallel, current-carrying wires, separated by a distance d = 4.5 cm, as shown in the figure. The left wire is directed out of the page with current I1, and the right wire is directed into the page with current I2. The point P is a distance d from both wires, so the wires and the point form an equilateral triangle. If both wires are carrying a current of 3.5 A, what is the magnitude of the magnetic field, in teslas, at point P?  If the current from the left wire is 3.5 A…

1. A wire carrying a 40-A current passes between the poles of a strong magnet that is perpendicular to its field and experiences a 2.42-N force on the 4.3 cm of wire in the field. What is the average magnetic field strength? Things to Prepare: 1. Draw a sketch of the scenario in your notebook. Draw a vector respresenting the average magnetic field generated by the strong magnet. As no other information is given, the vector can be drawn in any diretion. Draw the current-carrying wire with respect to the field vector drawn above, making sure that it is perpendicular to the field. B= T

A negatively charged particle is moving with a constant velocity directed to the left through a region of a uniform magnetic field B directed into the page as shown in the figure, in which direction must an electric field be applied to keep the particle moving along a straight line? XB Select one: a.Upward b.Downward c.into the page d.To the leftin the plane of the page e.Out of the page 1.To the right in the plane of the page

Physics 2. The right-hand rule allows one to find a property of the interaction of a magnetic field with a charged particle. The right-hand rule applied to moving charges:   a.  results in positive charges moving clockwise.   b.  results in negative charges moving clockwise.   c.  can be used for positive charges only.   d.  gives the direction of the force on a charge moving in a magnetic field.

What is the direction of the magnetic force on a negative charge that moves as shown in the figure? B Select one: O a. In O b. there is no magnetic force O. Out O d. Left When the light is passing from rarer to a denser medium, which is the correct statement? O a. speed becomes zero O b. speed of light increases speed of light remains constant O d. speed of light decreases

3. An electron moving at 3.60×103 m/s in a 1.21–T magnetic field experiences a magnetic force of 2.68×10-16 N. What angle does the velocity of the electron make with the magnetic field? There are two answers. list the smaller angle first, then next the larger angle)   This is not and will not be graded

18. Two very long conductors (both oriented in the same plane) are shown in the sketch below. The same magnitude of conventional current in each is represented by the red arrows. The black dot is at a position (in the same plane) equidistant between the conductors. Determine the direction of the magnetic field at the position of the black dot. A. There is no magnetic field at this position. B. The magnetic field is oriented out of the page. C. The magnetic field is oriented into the page. D. The magnetic field is oriented to the left. E. The magnetic field is oriented to the right.