I: This pentagonal loop of wire is in a uniform magnetic field; at t = 0 s, the
ID: 1493607 • Letter: I
Question
I: This pentagonal loop of wire is in a uniform magnetic field; at t = 0 s, the field begins increasing at a rate of 40 T/s:
II: This rectangular loop of wire is in a uniform magnetic field; at t = 0 s, the field begins decreasing at a rate of 43 T/s:
III: The figure shows a side view of a loop of wire with a bar magnet near but below the loop. The bar magnet's south pole is aimed up (towards the loop). At t = 0 s, the magnet is moved; it is either raised or moved left.
(the field not created by any current in the loop) ---Select--- into the page, out of the page, clockwise, counterclockwise (c) Change in magnetic flux for loop after t = 0 s ---Select--- increasing, decreasing, the flux is constant at this time (d) Direction of the Induced Magnetic Field after t = 0 s
(at the loop's center) ---Select--- into the page, out of the page, clockwise, counterclockwise, there is no induced magnetic field at this time (e) Direction of the Induced Current through the loop after t = 0 s ---Select--- into the page, out of the page, clockwise, counterclockwise, there is no induced current at this time
Explanation / Answer
Part 1
(a) there is no current at this time
(b) In to the page
(c) increasing
(d) there is no induced magnetic field at this time
(e) clockwise (from fleming's right hand rule)
Part 2
(a) there is no current at this time
(b) out of the page
(c) decreasing
(d) there is no induced magnetic field at this time
(e) counterclockwise (from fleming's right hand rule)
Part 3
(a) there is no current at this time
(b) into the page
(c) For Raised Increasing For moving left the flux is constant.
(d) there is no induced magnetic field at this time
(e) For Raised Clockwise, For moving left there is no current