10. Electromagnetism

Question 1

how does a moving charge/current create a magnetic field

Answer 1

it creates a changing electric field which in turn creates a magnetic field

Question 2

what is the right hand rule in terms of what it determines

Answer 2

determines direction of magnetic field when a current is moving through a wire

Question 3

how do you do the right hand rule

Answer 3

use right hand and place thumb in direction of current

grab wire

direction of fingers wrapping around wire = direction of magnetic field

Question 4

what is the equation used to determine the force acting on a charge

Answer 4

F = qvBsin(angle between velocity of charge and magnetic field)

q = charge
v = velocity
B = magnetic field

Question 5

what is plancks equation

Answer 5

E = hf

E = energy
h = plancks constant
f = frequency

Question 6

what is the relationship between wavelength, frequency and energy

Answer 6

short wavelength = higher freq = high energy