Choose the correct statement below about the interaction between magnets, magnetic materials and charges. O A stationary, charged piece of plastic is attracted to the north pole of a magnet. O The south magnetic pole attracts the south magnetic pole of another magnet. The north magnet pole attracts the north magnetic pole of another magnet. O A stationary, charged piece of plastic is attracted to both the north and south pole of a magnet. O The south magnetic pole attracts the north pole of another magnet.

I Review Part C A0.32 µC particle moves with a speed of 18 m/s through a region where the magnetic field has a strength of 0.99 T. You may want to review (Pages 773 - 777). At what angle to the field is the particle moving if the force exerted on it is 1.0 x 10-'N? Express your answer using two significant figures. | O You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Request Answer

Consider two parallel wires carrying current in the same direction. Which one of the following statements is true concerning this situation? O The two wires will repel each other, even no external magnetic field is applied to the wires. O The two wires will repel each other, only if an external magnetic field is applied to the wires. O The two wires will attract each other, even if no external magnetic field is applied to the wires. O The two wires will attract each other, only if an external magnetic field is applied to the wires. The wires will be neither attracted nor repelled from each other regardless of whether or not an external magnetic field is applied to the wires.

A magnetic sensor is mounted on a robotic spacecraft that is moving with velocity v in the direction of the Large Magellanic Cloud. A cloud of stray positive ions from the solar wind, also moving in the same direction with velocity v, surrounds the spacecraft. The software on the spacecraft sets up the magnetic sensor to measure the magnetic field of the cloud of positive ions. Which of the following statements is correct (select all that apply)? O The reading on the spacecraft's magnetic field sensor will show a value that is proportional to the total mass of the ion cloud O The reading on the spacecraft's magnetic field sensor will show a value that is proportional to the volume of the ion cloud O The reading on the spacecraft's magnetic sensor will show a value that is proportional to the total amount of charge in the ion cloud O The magnetic field produced by the ion cloud is not detectable by the spacecraft's magnetic sensor