Question

Near San Fran, CA the vertical downward component of the earth's magnetic field is 4.8 x 10^-5 T. A car is traveling forwards at 25 m/s. An emf of 2.4 x 10^-3 V is induced between the sides of the car.
a) which side of the car is positive
b)what is the width of the car

Answer 1

I know this is a lenz law question but there is a hint that tells us to use epsilon= -N*(delta phi)/(delta Time)

Answer 2

B=4.8 x 10^-5 T
V= 25m/s
E= 2.4 x 10^-3 V

Answer 3

OH no im stupid this obviously requires us to use phi=B*A*cos(theta)

Answer 4

okay so using that we can say that phi is also = to B (L) (W) cos(theta) and we can assume cosine will be 0 for max emf

Answer 5

okay so we have a relation between the magnetic flux and the length but we cant solve that equation without relating it to either Velocity or the induced emf

Answer 6

this question would be so much easier if they gave me a function to derive
freak me

Answer 7

oka gabe slow down a sec

Answer 8

the equations u gave earlier, are they the ones from the problem or the ones u came up with

Answer 9

they don't give me any equations except for that hint

Answer 10

but im deleting what ive ruled out

Answer 11

cuz what im thinking is that the equations in the problem with the negative exponets we should try and solve them first to see if they take us somewhere closer

Answer 12

dont delete anything yet

Answer 13

do what?

Answer 14

solve this problem

Answer 15

i am so lost

Answer 16

read the problem mudd