Unit 3 Lesson 3: Induction
A fishbowl has a circular opening with a diameter of 13 cm. The fishbowl sits upright on a table in a magnetic field of 0.00110 T that is directed downward. What is the flux through the glass of the bowl?
A. -1.5 x 10^-5 Wb
A circular area with radius 6.50 cm lies in the x-y plane. A uniform magnetic field of 0.230 T points in the +z direction. What is the magnitude of the magnetic flux through this circle?
A. 3.06 x 10^-3 Wb
A loop of wire is placed in a uniform magnetic field. Let ø be the angle between the direction of B and the normal. At which value of ø is the magnetic flux through the loop greatest?
B. 0 degrees
In the region of space shown in the diagram, there is a uniform magnetic field of strength 0.128 T in the direction of the +z axis. What is the magnetic flux across the surface abcd?
B. 0.000 Wb
A plane surface with an area 2.0 cm^2 is placed in a uniform magnetic field that is oriented at an angle of 30 degrees with the surface. The magnetic flux through this area is 0.60 mWb. What is the magnitude of the magnetic field?
C. 6.0 T
Which setup could not be used to induce an electric current?
C. spinning permanent magnets within an array of fixed permanent magnets
A fishbowl has a circular opening with a diameter of 15 cm. The fishbowl sits upright on a table in a magnetic field of 0.00110 T that is directed horizontally. What is the flux through the glass of the bowl?
D. 0.0 Wb
A circular area with radius 6.50 cm lies in the x-y plane. A uniform magnetic field of 0.230 T points at an angle 53.1 degrees from the +z direction. What is the magnitude of the magnetic flux through this circle?
D. 1.84 x 10^-3 Wb
A coil of wire is connected to a galvanometer as shown. A magnet is held stationary above the coil. Under what circumstances will the galvanometer indicate a current?
D. The magnet is moved toward or away from the coil
A conducting loop is placed in a magnetic field. What condition must be true for a current to be induced in the loop?
D. The magnetic field must be changing
