Electromagnetics

it is defined as one joule of work per coulomb of electric charge edit

volt

What Maxwell's equation can be used to represent KVL?

∇ x E = 0

What Maxwell's equation can be used to represent KCL?

∇· J = -dp/dt

emf = -dΦ/dt represents

Faraday's law

Father of Electromagnetism for having discovered the relationship between electricity and magnetism

Hans Christian Oersted

What happens to the energy of an electron as its distance from the nucleus increases?

Its energy (potential energy) increases

A point charge Q is inside a spherical surface. If the radius of the sphere is doubled, what happens to the total flux through its surface?

The total flux won't change at all. It remains constant.

Maxwell discovered that?

a time varying magnetic field creates electric field

Two plane parallel plates are given charges of equal magnitude and opposite sign. which is not true? a.) Electric field in between has a constant value b.) A point charge at either sides of the two planes will experience a force c.)The net flux is zero if enclosed by a Gaussian surface d.) Electric field is zero on either side of the plates edit

a.) Electric field in between has a constant value

in which of the following situations is magnetic field absent? a.) around a current carrying conductor b.) the region between the plates of a capacitor c.) the region surrounding a magnetic material

b.) the region between the plates of a capacitor c.) the region surrounding a magnetic material

properties of a conservative field

1. its curl must be zero 2. its circulation must be zero 3. it is irrotational

What are the properties of conductor in electrostatic equilibrium?

1. The electric field inside is ZERO. 2. All excess charges move to the surface of the conductor, making the net current in the conductor ZERO. 3. The direction and the magnitude of the electric field is just outside the surface of the conductor.

a point charge is located at the origin and closed by a sphere. the total flux is changed if?

1. The magnitude of the point charge changes 2. The point charge is moved outside the closed surface

Two concentric Gaussian surfaces enclose a charge. Which is correct? a. The outer surface will have twice the flux because of the induced charge on the inner surface b. The two surfaces do not affect each other c. The outer surface will have zero flux because the inner surface absorbed all the flux d. None of the above statements is correct.

d. None of the above statements is correct.

the net outflow of flux at a point per unit volume is the blank of the flux density

divergence

the maximum value of the rate of change in potential with respect to position is equal to

electric field

Electric field lines are always directed

from positive charges to negative charges; from a point of higher to lower potential

a point charge q is inside a spherical surface. what will happen to the total number of flux if the charge is tripled

it will also triple

this law states that the direction of any magnetic induction effect is such as to oppose the cause of the effect

lenz law

the violent explosions in the surface of the sun that causes geomagnetic storms on earth

solar flares

In an isolated conductor, the net current is zero because?

there is no movement of charges and the electric field inside the conductor is zero.