Please Help!

Complete each sentence or statement.
15. like charges____and opposite charges________.

16. A complete path through which charge can flow is an electric____.

17. To calculate power, multiply voltage measured in ____ by _____ measured in amps.

18. The magnetic field lines of a bar magnet begin near the magnet's_______.

19. A charged particle moving in a magnetic field will be deflected in a direction ______ to the magnetic field.

20. In a solenoid, there will be no magnetic field if there is no ______ in the wires of the coil.

21. Large power plants in the united states use ___________ generators.