Which of the following may be determined using Ampere's law?
a) electric fields due to current carrying wires
b) magnetic forces between two current carrying wires
c) magnetic fields due to current carrying wires
d) magnetic forces acting on charged particles
e) magnetic fields due to permanent magnets
Ans: c) magnetic fields due to current carrying wires
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a. 
b. 
c. 
d. 
e. 
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