Electrostatic forces

Electrostatic forces

forces that result from charged, stationary particles

Coulomb (C)

What is the unit of a charge?

e = 1.602×10^(-19) C

How much charge does an electron or proton have?

They have the same number of protons/electrons or they have similar numbers of protons/electrons and comparatively large mass

Why do some objects not have a charge?

The distance between the charges (r ) and the magnitude of each charge (q1, q2)

What determines the amount of force that two stationary charges would put on each other?

Coulomb’s law

What equation is used to describe the force that two stationary charges exert on each other?

F = (Kq1q2)/r²

Coulomb’s law

Coulomb’s constant (K)

8.99×10^9 Nm²/C²

F = (Gm1m2)/r²

What is the equation for the universal law of gravity?

The length scale of the system. For example, celestial bodies, which have very high mass but negligible charge difference, will be governed by huge gravitational forces. On the other hand, electrical systems such as molecules, etc. will be governed by electrostatic forces between the charged bodies since they have very small mass

What determines whether gravitational forces will dominate vs whether electrostatic forces will dominate?

No, the electric field is the amount of electric force per charge at that point in space (F/Q)

Is electric field the same as electric force?

E = F/Q

Electric field at a point in space is defined by what equation?

F = Q*E

What is the equation for electric force experienced by a charge in an electric field