NEED HELP AS SOON AS POSSIBLE, I JUST HAVE A FEW MINUTES LEFT!!! The diagram shows a cathode-ray oscilloscope (c. r.o.) being used to measure the rate of rotation of a flywheel. The flywheel has a small magnet M mounted on it. Each time the magnet passes the coil, a voltage pulse is generated, which is passed to the c. r.o. The display of the c. r.o. is 10 cm wide. The flywheel is rotating at a rate of about 3000 revolutions per minute. Which time-base setting will display clearly separate pulses on the screen? A 1 s cm -1 B 10 ms cm -1 C 100µs cm -1 D 1µs cm -1