D Question 4 2 pts Electric fields have various applications intssue engineering
ID: 2076873 • Letter: D
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D Question 4 2 pts Electric fields have various applications intssue engineering. Eectorotason, the rotation of partidos inelectic felds, is more reproducible ifaool is subjected toarotating vs a statc electric feld. To generate a rotating electric fold, four 00-degrees phase-shined voltagesignals are applied to four electrodes surrounding a celL as shown in Fgure 1, The rotation rate and direction depends on the empltude of the appled votage, frequenoy and on the properties of a cells substructures. Eectronotation can also be used for orientng polarizedoelisin specific dinectons for the engineering of distinct types of tissues Figure 1 Another application or electric fields is in delectrophonesis, induced lateral of the movement panicles in non-unarorm Acet is suspended ina w conductivity bufor and a non uniform electric foidis appled to me oe using microelectrodes on either side or the oelt. The cell behaveslae a delectic particle in an electric field, becoming polarized as aresult of particle charge separation, as shown in Fgure 2 in ms non uniform elentne field, the imbalance in the forers on ori ndures movement The field srength near the srat er electooe on the ngrtis greater than that rear the larger electrode on en which res lts anel force on the onit toward thn straler the post ve delectropheress, occurs elertroce Th s mevement otthe rell 1ownd thn hivhnr st when the moves oward tow field ever Arrays of microelectroues aan be se upon wh an unsExplanation / Answer
Slope of the graph = Change in the capacitance value / change in the conc.
we take extreme points in the calculation
= (2 - 0.4) pF / (0.9 - 0.2) * 106
= 2.285 * 10-18 units
so option 3 is correct
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