Physics 2: Midterm 2

Determine current and voltage in each resistor

1. find equivalent resistance in series resistors

2. find total resistance

3. find all I(total, and one for each series eq) values by using ohms law

4. multiply each resistor’s resistance by the current in that series

5. add together to verify kirchoffs law (should equal initial voltage)

6. create a table with the answer

Square to circle wire EMF

1. Find area of both square and circle

2. use faradays law

3. find change in magnetic flux by doing B(Af-Ai)

4. B=magnetic field!!

5. divide by change in time

Square to circle DIRECTION AND MAGNITUDE

1. use I=ε/R

2. RHR opposite of inital because of lenz’s law

levitating wire loop FBD

Fb pointing up

Fg pointing down

levitating wire loop current

1. use N2L to prove Fb=Fg

2. use F=ILBsinθ

3. sinθ=1

4. Fg=mg=λLg

5. λLg=ILB

6. I=λg/B

7. λ is the mass per unit length (kg/m)