1. Why positive charge moves from higher voltage to lower voltage?
2. why negative charge moves from lower voltage to higher voltage?
3. if one positive charge of 1 coulomb spontaneseously moves between point 100 volt and 150 volt, it converts some of the energy it has into energy of motion, how much energy would this charge convert to energy of motion?
4. 12 volts with 2 amperes and a circuit of 12 volt with 5 amperes, which has higher electrical resistance? why? (i answer the 2 amperes with higher resistance between with resistance, that's why it is lower or else with lower resistance, it would be 5 amperes)
5. why some magnetic materials are magnets while others are not but behave like one in the presence of another magnet?
6. why some materials are magnetic while others may be non-magnetic.?
7. if i drop a magnet through long vertical copper pipe and it moves slowly compared with the drop of a nonmagnetized object. why?
thx 4 the help, those were only problem i got stuck wit
2007-10-14
22:06:21
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