Question

Problem 8 (5 pts): Consider two silver wires, one wire has 3 times the length and half the radius of the other. How do the resistivities of these two wires compare? A) The longer wire has 4/3 times the resistivity of the shorter wire. B) The longer wire has 3 times the resistivity of the shorter wire. C) Both wires have the same resistivity D) The longer wire has 3/4 times the resistivity of the shorter wire. Problem 9 (5 pts): Consider the circuit shown in the figure. When the switch S is closed, how will the current passing through R do) and the current passing through the battery () change? A) Ii will increase, Ir will increase. B) Ii will remain the same, Ir will increase. C) Ii will decrease, Ir will increase. D) Ii will decrease, Ir will decrease. E) I, will remain the same, Ir will decrease. Problem 10 (5 pts): A resistor and a capacitor are connected in series across an ideal battery having a constant voltage across its terminals. At the moment contact is made with the battery, the voltage across the resistor is: A) equal to the battery's terminal voltage B) less than the battery's terminal voltage, but greater than zero C) zero D) less than the voltage across the capacitor Problem 11 (5 pts): Kirchhoff's loop rule is a statement of A) the law of conservation of momentum B) the law of conservation of energy C) the law of conservation of charge D) the law of conservation of angular momentum

Answer 1