Một điện lượng 60mC dịch chuyển qua tiết diện thẳng của dây dẫn trong khoảng thời gian 2s. Tính cường độ dòng điện chạy qua dây dẫn.

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

Determine the maximum r-value of the polar equation r =3+3 cos 0