You have a pair of fabulous stereo speaker cabinets. Each cabinet contains 5 individual speakers. Unfortunately, one of the individual speakers is broken, so you buy an identical replacement and install it yourself. In the process, you reverse the two electrical connections to the speaker so that current flows backward through the speaker coil. The speaker cone moves the wrong way and makes the entire stereo sound odd. The speaker cone moves the wrong way because
A)	the current flowing backward through the speaker coil magnetizes it backward so that it is pushed in the wrong direction by the speaker's permanent magnet.
B)	the charge on the speaker coil becomes positive rather than negative so that it is pushed in the wrong direction by the speaker's permanent magnet.
C)	the charge on the speaker coil becomes negative rather than positive so that it is pushed in the wrong direction by the speaker's permanent magnet.
D)	the current flowing backward through the speaker coil polarizes its electrical charges backward so that they are attracted when they should be repelled and repelled when they should be attracted.
Answer:A
You have a pair of fabulous stereo speaker cabinets. Each cabinet contains 5 individual speakers. Unfortunately, one of the individual speakers is broken, so you buy an identical replacement and install it yourself. In the process, you reverse the two electrical connections to the speaker so that current flows backward through the speaker coil. The speaker cone moves the wrong way and makes the entire stereo sound odd. The speaker cone moves the wrong way because
A)	the current flowing backward through the speaker coil magnetizes it backward so that it is pushed in the wrong direction by the speaker's permanent magnet. B)	the charge on the speaker coil becomes positive rather than negative so that it is pushed in the wrong direction by the speaker's permanent magnet. C)	the charge on the speaker coil becomes negative rather than positive so that it is pushed in the wrong direction by the speaker's permanent magnet. D)	the current flowing backward through the speaker coil polarizes its electrical charges backward so that they are attracted when they should be repelled and repelled when they should be attracted.