Answer to Question #292868 in Physics for osei

Question

Electrophoresis is a medical therapy technique used to deliver medicaments into the patients body with help of an electric current. During the procedure, two oppositely charged plates are applied to the body providing flow of the current through the tissue. Suppose that current used in first five procedures was 7 mA (duration of the procedure 6 min) and during the last fifteen procedures 14 mA (duration 15 min). Find charge that passes through the body during 20 electrophoresis procedures.

Answer 1

Current of 7 mA used in first five procedures during 360 s is a charge of

$$Q_1=5·0.007·360=12.6\text{ C}.$$

Current of 14 mA used in fifteen procedures during 15 min 60 s each is a charge of

$$Q_1=15·0.014·(15·60)=189\text{ C}.\\ Q=Q_1+Q_2=201.6 \text{ C}.$$