Question

For direction questions the choices are: into page, out of page, clockwise, counterclockwise, or no induced field. Letters (m), (n), (q) and (r) have choices: up, down, left, right, into page, out of page, or no induced field. The change in flux is either increasing, decreasing, or constant. Thank you for your help!

I.)

a.) Change in the magnetic flux causes induced current, not the magnetic field itself. So, before t = 0 , there is no current induced.

b.) Into the page. As indicated by the x marks.

c.) Increases as the magnetic field is also increasing continually

d.) Indued magnetic field always tries to oppose the change. So, Induced magnetic field points out of the page to oppose the increasing magnetic field going into the page.

e.) By using right-hand rule we can say that the induced current needs to be in the anti-clockwise direction to give an induced magnetic field out of the page.

II.)

f.) Change in the magnetic flux causes induced current, not the magnetic field itself. So, before t = 0 , there is no current induced.

g.) Out of the page. As indicated by the dots.

h.) Decreases as the magnetic field is also decreasing continually

i.) Induced magnetic field always tries to oppose the change. So, Induced magnetic field points out of the page to support the decreasing magnetic field coming out of the page.

j.) By using right-hand rule we can say that the induced current needs to be in the anti-clockwise direction to give an induced magnetic field out of the page.

III.)

k) & l) There is no current before t=0 because the magnetic field is not changing

m) & n.) Magnetic field lines come out of the north pole and go into the south pole of a magnet. So, the field lines point upwards.

o.) Increases because magnetic field lines get more intense as we get closer to the magnet.

p.) Decrease because the intensity of the magnetic field lines through the loop would decrease as we move the magnet towards the right.

q.) Down. As said before, the induced magnetic field always tries to oppose the change in the magnetic flux and in order to oppose the magnetic field increasing upwards, the induced magnetic field acts in the downward direction.

r.) Up. In order to support the decreasing magnetic field in the upward direction, the induced magnetic field also acts upwards.

s.) using the right-hand rule we get that the current when looked from above needs to in the clockwise direction to generate a magnetic field in the downward direction

t.) using the right-hand rule we get that the current when looked from above needs to in the anticlockwise direction to generate a magnetic field in the upward direction

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