An electric eel generates electric currents through its highly specialized Hunter's organ, in which thousands of disk-shaped cells called electrocytes are lined up in series, very much in the same way batteries are lined up inside a flashlight. When activated, each electrocyte can maintain a potential difference of about 150 mV at a current of 1 A for about 2.0 ms. Suppose a grown electric eel has 3.60 ✕ 103 electrocytes and can deliver up to 300 shocks in rapid series over about 1 s. (a) What maximum electrical power can an electric eel generate?   (b)  Approximately how much energy does it release in four shocks?   (c) How high would a mass of 9 kg have to be lifted so that its gravitational potential energy equals the energy released in 300 such shocks?

Jerry sticks Tom’s tail in an electrical socket (Vrms = 115 V at 60 Hz). Ini-tially, we can think of Tom’s tail as a single 22 kΩ resistor connected to the floor by hislegs. His hind legs are 65 kΩ resistors and his front legs are 55 kΩ resistors. (His bodyhas no resistance, and the floor is connected to a ground wire in the socket, which com-pletes the circuit with no additional resistance.)a) How much power is dissipated in Tom, on average? b) Now Tom jumps in the air as a result of the shock. This makes him equivalent to aparallel-plate capacitor with an area of 40.0 cm2 (the total area of his paws) and a spac-ing of 6.0 cm. What is his capacitance? c) This capacitance can be thought of as in series with the total resistance you deter-mined in part a). Now how much current (rms) goes through Tom, and what is thephase shift of this current with respect to the emf?d) Tom is already planning to use a solenoid in self-defense as in Episode 3. Whatshould its inductance be so that the…

P Question 21

Cell membranes contain channels that allow ions to cross the phospholipid bilayer. Suppose that a particular potassium channel carries a current of 2.1 pA2.1 pA. How many potassium ions (K+K+) pass through it in 1.0 ms1.0 ms?