Amass spectrograph is used to measure the masses of ions. true or false

It is true.  

Mass spectrometry (MS) is an analytical technique that measures the mass-to-charge ratio of ions. The results are typically presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures.  

A mass spectrum is a plot of the ion signal as a function of the mass-to-charge ratio. These spectra are used to determine the elemental or isotopic signature of a sample, the masses of particles and of molecules, and to elucidate the chemical identity or structure of molecules and other chemical compounds.

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this