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If both charges have the same sign (like charges) then the product is positive and the direction of the force on is given by ^; the charges repel each other. If the charges have opposite signs then the product is negative and the direction of the force on is ^; the charges attract each other.
Induction causes a separation of the charges inside the electroscope's metal rod, so that the top terminal gains a net charge of opposite polarity to that of the object, while the gold leaves gain a charge of the same polarity. Since both leaves have the same charge, they repel each other and spread apart.
Magnets exert forces and torques on each other through the interaction of their magnetic fields.The forces of attraction and repulsion are a result of these interactions. The magnetic field of each magnet is due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that make up the mater
When the charges and have the same sign this force is positive, directed away from the other charge, indicating the particles repel each other. When the charges have unlike signs the force is negative, indicating the particles attract.
Electric charges attract or repel one another with a force inversely proportional to the square of the distance between them: opposite charges attract, like charges repel. [ 7 ] Magnetic poles (or states of polarization at individual points) attract or repel one another in a manner similar to positive and negative charges and always exist as ...
Electric charge (symbol q, sometimes Q) is a physical property of matter that causes it to experience a force when placed in an electromagnetic field. Electric charge can be positive or negative. Like charges repel each other and unlike charges attract each other. An object with no net charge is referred to as electrically neutral.
By the 18th century, it was understood that objects can carry positive or negative electric charge, that two objects carrying charge of the same sign repel each other, that two objects carrying charges of opposite sign attract one another, and that the strength of this force falls off as the square of the distance between them.
In the conceptual model of fundamental interactions, matter consists of fermions, which carry properties called charges and spin ± 1 ⁄ 2 (intrinsic angular momentum ± ħ ⁄ 2, where ħ is the reduced Planck constant). They attract or repel each other by exchanging bosons.