[Vật lí 11] bài cường độ

L

likenike

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T

thanhnhan1996

a)ta có E= kq/d
\Rightarrow Ec1=cos60.k.q1/d^2
\Rightarrow Ec2=cos60.k.q2/d^2
\Rightarrow E= Ec1+ Ec2
b) tương tự Ec1= cos45.k.q1/d^2
Ec2=cos45.k.q1/d^2 :|:|:|
 
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