Tuesday, July 14, 2009

I need help on these siece questions?

can u plz help me with these questions?





1 . Electric charge that has built up in one place is called what kind of electricity?





A. current


B. circuit


C. static


D. current circuit





2 . Static discharge differs from an electric current in that a static discharge





A. is a flow of electrons.


B. lasts for only a fraction of a second.


C. involves the movement of ions as well as electrons.


D. results because a force is exerted on the electrons.





3 . Which of the following describes lightning?





A. a very large discharge of static electricity


B. a high voltage electric current


C. a build up of neutrons


D. harmless





4 . A circuit that has two or more separate paths for electrons to follow is a





A. parallel circuit.


B. series circuit.


C. circuit diagram.


D. electron circuit.





5 . Which is a path created for a current that allows only one route of travel?





A. series current


B. parallel current


C. parallel circuit


D. series circuit





6 . A material through which electrons do not readily flow is a(n)





A. transformer.


B. insulator.


C. conductor.


D. fuse.





7 . Resistance is measured using which unit?





A. volts


B. ohms


C. coulombs


D. amperes





8 . Which scientist discovered that "current is equal to the potential difference divided by the resistance"?





A. Ohm


B. Newton


C. Faraday


D. Watt





9 . A television that requires .40 ampere of current is operated on a 120-volt service for 5 hours. How much energy is used?





A. .67 kWh


B. .15 kWh


C. .24 kWh


D. 1.5 kWh





10 . Which of these contains a source of constant electric current?





A. switch


B. transformer


C. dry cell


D. wire





11 . Where is the location of the strongest magnetic forces in a magnet?





A. atoms


B. magnetic fields


C. magnetic poles


D. magnetic domains





12 . What is the region around a magnet where the magnetic forces are acting?





A. magnetic field


B. magnetic poles


C. ammeters


D. domains





13 . Which of the following describes the atoms in a magnet?





A. They are positively charged.


B. They are negatively charged.


C. They are lined up according to their charges.


D. They are arranged randomly.





14 . The function of a generator is to change





A. electrical energy to mechanical energy.


B. chemical energy to electrical energy.


C. mechanical energy to electrical energy.


D. electrical energy to chemical energy.





15 . What is a transformer called that increases voltage?





A. step-up transformer


B. resistance transformer


C. step-down transformer


D. voltage motor





16 . Current that does not reverse direction is called





A. direct current.


B. circuit current.


C. magnetic current.


D. alternating current.





17 . The function of an electric motor is to change





A. electrical energy to chemical energy.


B. mechanical energy to chemical energy.


C. chemical energy to electrical energy.


D. electrical energy to mechanical energy.





18 . A generator creates a 90-Hz alternating current. How many times does the current reverse each second?





A. 45 times


B. 180 times


C. 90 times


D. 360 times





19 . Which of the following produces direct current or DC?





A. nuclear power plant


B. hydroelectric dam


C. wind turbine


D. 12-volt battery





20 . Which of the following would not change the strength of an electromagnet?





A. increasing the number of loops


B. inserting an iron core inside the wire


C. changing the current's direction


D. increasing the amount of current

I need help on these siece questions?
Can you at least split the assignment into different questions?





1. C
Reply:1 C


2. B


3. A


4. A


5. A


6. B


7. B


8. A


9. D


10. C


11. A


13. C


14. C


15. A


16. A


17. D


18. C


19 D


20. C





and so on


Please read the required material and correct answers will start popping out.
Reply:C


B


A


A


A


B


B


A


D


C


A


C


C


A


A


i think its D....


C


D


C
Reply:answers CBAAABBACAD(NOT KNOW)CBDC
Reply:We are here to help with some concerns that you might have but were not here to do all your homework!!!

wreath

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