Boka reGrade 11 Physics ranga richishandisa chidimbu chedu chitsva chemuchina mutsva - dual beam chubhu - kuyera kuchaji kusvika kuhuwandu hwereshiyo (q/m) yemaerekitironi. Maelectrons ndiwo yakakwidziridzwa kusvika kumamita anosvika mamiriyoni gumi pasekondi, isati yakombamira munzira yedenderedzwa nemagineti. Nekuyera dhayamita yedenderedzwa uye ikozvino mumunda makoiri, q/m inogona kutsanangurwa. Nzira yemaerekitironi maviri matanda anogona kuonekwa semitsetse yeorenji muchubhu, zvichikonzerwa nemaerekitironi anorova neon maatomu aripo pakumanikidzwa kwakaderera.