Question 16: When a neuron is prepared to activate, the potential dif- ference moving from the outside to the inside is about 70mV. If a sodium ion (charge +0) moves from out- side the neuron to the inside, what is the change in electric potential energy? (0) 1.1 X 10-2\" J Question 17: A circuit consists of a 9.2V emf, and two resistors in par allel. One resistor has resistance 5.09, and the other has resistance 8.0 Q. What current ows out of the battery? (A) 0.71 A (b) 1.4 A (c) 3.0 A (d) 28 A (e) 120 A 11 Question 18: \\Which of the following statements are true in a circuit that has reached the steady state? I. The sum of all the currents owing into any point on the circuit is equal to the sum of the currents owing out of that point. H. The drift velocity is constant at all points in the cir- cuit. III. The electric potential is constant at all points in the circuit. Question 19: The diagram below depicts two wires resting on a hori- zontal table, carrying currents of the same size in opposite directions. Points A, B, and C are all on the table. Point B is exactly halfway between the wires. At which of these points, if any, is the magnetic eld di rected out of the table (out of the page)? Question 20: The neutron has no not electric charge, but it is made of electrically charged particles and has a magnetic dipole mo- ment, about 9.66 X 102? J / T. The neutron has a radius of about 8.0 X 10min. If the neutron's magnetic moment comes from a net electric current owing in a circular loop of that radius, what is the current