Friday, February 12, 2010

Electric Charges. True or False.?

Neutrons are negitively charged?





Equal number of protons and electrons the atom is neutral?





The accumulation of electric charges on an object is called magnetism?





The electric field caused by an electron is weakest near the electron.





An electric field becomes weaker as distance from the electron increases?





A conductor is a material that allows electrons to flow through is EASILY?





Metals are poor conductors of electricity?





plastics, rubber, wood and glass are good conductors?





Earth serves as a conductor of electricity?





The presence of electric charges can be detected with an electroscope?





The leaves of an electroscope hang straight down whent he device receives a charge?





If both leaves of an electroscope receives a negitive charge, the leaves will attract each other?





When an object loses electrons, it gains a negitive charge?





if it is wrong, tell me why ? :)





THANKS! :]Electric Charges. True or False.?
Neutrons are negitively charged?


FALSE: NEUTRONS ARE NEUTRAL





Equal number of protons and electrons the atom is neutral?


TRUE: PROTON HAS A POSITIVE CHARGE EQUAL TO THE NEGATIVE CHARGE OF THE ELECTRON





The accumulation of electric charges on an object is called magnetism?


FALSE: IT IS STATIC ELECTRICITY





The electric field caused by an electron is weakest near the electron.


FALSE: THE ELECTRIC FIELD IS PROPORTIONAL TO THE INVERSE OF DISTANCE SQUARED. SO THE CLOSER TO THE ELECTRON THE STRONGER THE FIELD.





An electric field becomes weaker as distance from the electron increases?


TRUE FOR THE SAME REASON AS ABOVE.





A conductor is a material that allows electrons to flow through is EASILY?


TRUE





Metals are poor conductors of electricity?


FALSE: METALS ARE VERY GOOD CONDUCTORS (E.G. COPPER)





plastics, rubber, wood and glass


are good conductors?


FALSE: THESE ARE INSULATING MATERIALS THUS VERY BAD CONDUCTORS.





Earth serves as a conductor of electricity?


TRUE





The presence of electric charges can be detected with an electroscope?


TRUE





The leaves of an electroscope hang straight down whent he device receives a charge?


FALSE: WHEN CHARGED THE LEAVES WILL REPEL EACH OTHER AND WILL NOT HANG STRAIGHT DOWN.





If both leaves of an electroscope receives a negitive charge, the leaves will attract each other?


FALSE: OPPOSITE ATTRACTS. TWO NEGATIVE CHARGES WILL REPEL EACH OTHER.





When an object loses electrons, it gains a negitive charge?


FALSE: ELECTRONS HAVE NEGATIVE CHARGES SO LOOSING NEGATIVE CHARGES IS AKIN TO GAINING A POSITIVE CHARGE.





cheers!

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