In the drawings, loop 1 has initially a current I_1 (source not shown). Indicate
ID: 1631469 • Letter: I
Question
In the drawings, loop 1 has initially a current I_1 (source not shown). Indicate with arrows (cw or ccw) the direction of the induced current in loop 2 in the following situations. Also answer if the loops attract or repel as a consequence of the induction. (a) Current I_1 is CCW and increasing: Loops attract or repel? _____ (b) Current I_1 is CCW and decreasing Attract or repel? _____ (c) Current I_1 is CW and increasing: Loops attract or repel?_____ (d) Current I_1 is CW and decreasing loops attract or repel? _____ (e) Current I_1 is again CCW but constant. Loop 1 approaches loop 2 Mark the induced current in loop 2. Attract or repel? _____ (f) Do the same as in (e) but with loop 1 getting away from loop 2 Attract or repel? _____Explanation / Answer
Lenz's law states that direction of induced current is such that it creates a magnetic field which opposes the change that produced it.
a)I2 will be clockwise and it will produce a magnetic field which will oppose the increase in the field strength of the magnetic field produced by increasing I1
.Loops will repel
b)I2 will be counter clockwise and it will produce a magnetic field which opposes the decrease in the field strength of the magnetic field produced by decreasing I1
Loops will attract.
c)I2 will be counter clockwise and it will produce a magnetic field which will oppose the increase in the field strength of the magnetic field produced by increasing I1
.Loops will repel
d)I2 will be clockwise and it will produce a magnetic field which opposes the decrease in the field strength of the magnetic field produced by decreasing I1
Loops will attract.
e)I2 will be clockwise and it will produce a magnetic field which will oppose the increase in the field strength of the magnetic field produced by the movement of loop1 towards loop2.
Loops will repel.
f)I2 will be counter clockwise and it will produce a magnetic field which will oppose the decrease in the field strength of the magnetic field produced by the movement of loop1 away from loop2.
Loops will attract.