Saved Question 1 (Mandatory) (1 point) Which of the following scientists first used a bar magnet in a pool of mercury to show that a current-carrying conductor would rotate? O a) Tesla O b) Faraday O c) Oersted O d) AmpereQuestion 3 (Mandatory) (1 point) The following diagram shows a multiple coil DC motor with a soft-iron core. For the coil in the given position and conventional current in the direction indicated, what magnetic pole is side A of the coil and in what direction will the motor spin? O a) north, clockwise O b) south, counterclockwise O c) north, counterclockwise O d) south, clockwise Question 4 (Mandatory) (1 point) Far the following solenoid, in which direction will the magnetic field lines point? O a) upward O b) circular clockwise O ) downward O d) circular counterclockwise Question 7 (Mandatory) (1 point) Saved Ampere performed which of the following experiments involving electricity and magnetism? ) a) He experimented with large potential differences to transmit electricity wirelessly b He held a compass close to a wire to determine the direction of the magnetic field created by current. o) c) He placed two wires parallel to determine the direction of force between . them when current is applied. /) d) He placed a conducing wire around a magnet in a pool of mercury. Previous Page m Page 7 of 20 Question 10 (Mandatory) (1 point) The following solenoid has a magnetic field as shown. In what direction is the current travelling through the wire? O a) from top to bottom O b} into the page O ) from bottom to top O d) none of the above Question 13 (Mandatory) (1 point) ~ Saved In what direction will the compass needle point for the following diagram? @ a) south o b) north O ) west O a) east Saved Question 16 (Mandatory) (1 point) Which symbol is used to represent current flowing out of the page? O a) an open circle O b) a triangle O c) a dot O d) an XQuestion 17 (Mandatory) (1 point) For the following DC motor, the loop is oriented vertically with the wires disconnected from the battery. What will happen if the wires are connected? P \\/ a) The loop will spin counterclockwise. \\/ b) The magnetic field will reverse. Il / } The loop will not spin. P ./ d) The loop will spin clockwise. Question 18 (Mandatory) (1 point) For the following diagram, the current-carrying wire will experience a force in wh direction? S S O a) downward b) left O cl right O d) upward Page 18 Next Page Previous PageQuestion 19 (Mandatory) (1 point) Where does Earth's magnetic field exist? O a) only outside of Earth O b) only inside of Earth O c) only at sea level d) both inside and outside of Earth