# Electromagnetism Question?

A large electromagnet is to be used to generate the required π©ββ -field in a mass spectrometer device. The parallel plates that make up the velocity selector portion of the device have an electric field strength of π = 345 N/C, while the accelerating plates (10 sets in total) have a strength π = 265 N/C and each... show more A large electromagnet is to be used to generate the required π©ββ -field in a mass
spectrometer device. The parallel plates that make up the velocity selector portion of the
device have an electric field strength of π = 345 N/C, while the accelerating plates (10
sets in total) have a strength π = 265 N/C and each have a separation of 5.00 cm.
Electrons are accelerated through the device and detected on a detecting screen as
discussed in class.

b) If the electromagnet has a length of 30.0 cm and is supplied 3.00 mA, how many
turns are needed to produce the B-field required to select only those electrons that
were accelerated from rest? The magnitude of the magnetic field generated by a
solenoid is

π΅ = ππ(π/πΏ)πΌ

c) Where will the electrons be located, relative to where they entered the detecting
region?