# please solve all the questions, i really need the answers. also please show all the required...

3. Each diagram below represents two parallel current-carrying conductors. In each case, determine whether the conductor the conductors attract or repel one another, Explain your reasoning IT 4) a) b) 4. Each empty circle below represents a small compass near a coiled conductor, or solenoid. Label the N and Spoles of each coil and indicate the direction of the needle in each compass. (C4) a) b) olimo IC 41 s 0000 0000 N 5. The circles in the diagrams below represent a conductor of a solenoid. Show the direction of the current in each conductor with the use of an X or dot. a) b) OOOO N s OOOO 6. A bar magnet is used to induce a current in a coiled conductor State the effect on the current in the following circumstances. a) The number of coil windings is increased. b) The speed of motion of the magnet relative to the coil is increased. c) The strength of the magnet is increased. d) The magnet is stopped relative to the coil. [K11 [K1) [K1) [K1)
7. Why does the basic operation of a transformer depend on alternating current rather than on a constant direct current? [C 31 8. A model electric train operates at 8.0 V. A transformer with a primary coil having 930 windings is plugged into a 120 V circuit. What is the number of windings on the secondary coll? [A 2] 9. An electric doorbell uses a transformer to obtain 6.0 V. If the primary coil has 840 turns and the secondary coil has 42 turns, what is the primary coil potential? [A 2]

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