They are not assuming that the electric field is pointing to the left.Callumnc1 said:
Thank you for your reply @SammyS !SammyS said:
The process for finding the value of an unknown charge involves using known values of other charges and the principles of Coulomb's Law. This law states that the force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them. By setting up and solving equations based on this law, the value of the unknown charge can be determined.
Yes, the value of an unknown charge can be negative. In fact, charges can have positive or negative values, and the sign of the charge determines the direction of the electric force between two charges. It is important to pay attention to the signs of all charges when solving for the value of an unknown charge.
The SI unit for electric charge is the coulomb (C). Other commonly used units include the microcoulomb (μC) and the millcoulomb (mC). These units are based on the fundamental unit of charge, the elementary charge, which is approximately equal to 1.602 x 10^-19 C.
Yes, the value of an unknown charge can change over time. This is because charges can be transferred from one object to another through processes such as friction, conduction, and induction. The amount of charge on an object can also change due to the addition or removal of electrons.
Yes, there are limitations to using Coulomb's Law to find the value of an unknown charge. This law assumes that charges are stationary and that there are no other external forces acting on them. In reality, charges can move and interact with other forces, which can affect the accuracy of using Coulomb's Law to determine the value of an unknown charge.