A) electrostatics
B) electromagnetism
C) magnetostatics
D) none of these
Correct Answer: A
Solution :
Key Idea: Electric field possesses the property of electric charge. Electrostatics is the branch of physics that deals will the forces exerted by a static (i.e., unchanging) electric field upon charged particles. Electromagnetism is the physics of the electromagnetic field, a field encompassing all of space which exerts a force on those panicles that possess the property of electric charge and is in turn affected by the presence and motion of such particles. Magnetostatics is the study of static magnetic fields. Note: In electrostatics the charges were stationary but in magnetostatics the currents are static.
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