Caption Electric field lines that spread around the camera and a plant stem are shown in white-blue colors. They run from the transmitting electrodes of the thin, extended rear end to the ...

During the latter part of the 20th century, string theory was put forward as a unifying theory of physics foundations. String ...

(i) Field lines start from positive charges and end at negative charges. If there is a single charge, they may start or end at infinity. (ii) In a charge-free region, electric field lines can be ...