What symbol would best represent an electric fan speed controller in an electric circuit?
Answer
A
Image with description A short horizontal line at each end with a stack of vertical lines in the middle, which are from left to right very short, short, very short, short.
B
Image with description A short horizontal line then a zigzag then a short horizontal line.
C
Image with description A circle with an X in it.
D
Image with description A short horizontal line then a small circle then a short line pointing up at about 45 degrees then a short gap then a small circle then a short horizontal line