# what are the differences between alternating and direct potential differences?

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Thread starter 4 years ago
#1
the aqa physics spec says we should be able to explain the differences. I cant find much on alternating pd, only on alternating current and direct current; are they the same thing? :/
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4 years ago
#2
(Original post by User07_)
the aqa physics spec says we should be able to explain the differences. I cant find much on alternating pd, only on alternating current and direct current; are they the same thing? :/
The difference(s) between AC and DC is the same as the differences between alternating pd and direct pd.
1
4 years ago
#3
(Original post by User07_)
the aqa physics spec says we should be able to explain the differences. I cant find much on alternating pd, only on alternating current and direct current; are they the same thing? :/
When you think about it, if the p.d alternates, then the current should also be alternating (according to ohm's law).

So alternating p.d is the same as AC and direct p.d is the same as DC.
1
Thread starter 4 years ago
#4
(Original post by stoyfan)
When you think about it, if the p.d alternates, then the current should also be alternating (according to ohm's law).

So alternating p.d is the same as AC and direct p.d is the same as DC.
that makes sense, thank you !!
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Thread starter 4 years ago
#5
(Original post by stoyfan)
When you think about it, if the p.d alternates, then the current should also be alternating (according to ohm's law).

So alternating p.d is the same as AC and direct p.d is the same as DC.
hmm, thanks !!!
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