Q(M2): In a solenoid, if the number of turns increases by a factor of 2 and the length of the solenoid decreases by a factor of 2, what happens to the magnetic field in the solenoid? It becomes a quarter of what it was. It becomes a half of what it was. (c) It stays the same. (d) It doubles. (e) It quadruples.

Q(C1): If a dielectric material is added to a capacitor hooked to a battery, which of the following statements is true? (a) The electric field in the capacitor decreases. (b) The energy stored in the capacitor increases. (c) The capacitance increases. (d) The potential across the capacitor decreases. (e) None of the above.

Q(EM2): A long wire carries a current, I, as shown in the figure Q(EM2): A long wire carries a current, I, as shown in the figure. A square loop moves in the same plane as the wire as indicated. In which cases will the loop have an induced current? a) cases 1 and 2 b) cases 1 and 3 c) cases 2 and 3 d) None of the loops will have an induced current. e) All of the loops will have an induced current.

Q(R2): A current of 2.00 A is maintained in a circuit with a total resistance of 5.00 Ω. How much heat is dissipated in 4.00 s? a) 55.2 J b) 80.0 J c) 116 J d) 168 J e) 244 J

Q(M3): In what direction will the electron be deflected as it enters the constant magnetic field? a) into the page b) out of the page c) up d) down e) no deflection

Q(Ci1): A resistor and capacitor are connected in series Q(Ci1): A resistor and capacitor are connected in series. If another capacitor is put in parallel with the first, what happens to the time constant? (a) It increases. (b) It stays the same. (c) It decreases.

Q(C3): State whether each of the following statements about an isolated parallel plate capacitor is true or false. (a) When the distance between the plates of the capacitor is doubled, the energy stored in the capacitor doubles. (b) Increasing the distance between the plates increases the electric field between the plates. (c) When the distance between the plates is halved, the charge on the plates stays the same. (d) Inserting a dielectric between the plates increases the charge on the plates. (e) Inserting a dielectric between the plates decreases the electric field. Instructor’s Notes

Q(R3): When picking out which wire to use to connect an oven, what things should you keep in mind? (a) The size of the wire, because we want to make sure the resistance is low enough. (b) The current that needs to go to the oven, because that will set the power dissipated in the wire. (c) The voltage at the connection, because that will determine the amount of voltage that can be lost in the wire. (d) The power that the oven requires, because that will set the current draw of the device.

Q(M1): Two wires are running parallel with currents in the same direction. If wire 1 has a current of 1A and wire 2 has a current of 2A, which of the following is true? (a) The wires repel each other. (b) The wires attract each other. (c) The force on wire 1 is larger than the force on wire 2. (d) The force on wire 2 is larger than the force on wire 1. (e) The magnetic force moves the wires and therefore does work.

Q(Ci2): In the multiloop circuit shown in the figure, V1 = 6 Q(Ci2): In the multiloop circuit shown in the figure, V1 = 6.00 V, V2 = 12.0 V, R1 = 10.0 Ω, and R2 = 12.0 Ω. What is the magnitude of current i2? a) 0.600 A b) 0.750 A c) 1.00 A d) 1.25 A e) 1.50 A

Q(Ci3): In the multiloop circuit shown in the figure, V1 = 6 Q(Ci3): In the multiloop circuit shown in the figure, V1 = 6.00 V, V2 = 12.0 V, R1 = 10.0 Ω, and R2 = 12.0 Ω. What is the magnitude of current i1? a) 0.600 A b) 0.750 A c) 1.00 A d) 1.25 A e) 1.50 A

Q(C2): Three capacitors are connected to a battery as shown in the figure. If C1 = C2 = C3 = 10.0 μF and V = 10.0 V, what is the charge on capacitor C3? (a) 66.7 μC (b) 100. μC (c) 150. μC (d) 300. μC (e) 457. μC Instructor’s Notes

Q(M4): Three wires are carrying currents of the same magnitude, i, in the directions shown in the figure. Four Amperian loops (a), (b), (c), and (d) are shown. For which Amperian loop is the magnitude of the greatest? a) loop a b) loop b c) loop c d) loop d e) All four loops yield the same value of .

Q(EM1:) A power supply is connected to loop 1 and an ammeter as shown in the figure. Loop 2 is close to loop 1 and is connected to a voltmeter. A graph of the current i through loop 1 as a function of time, t, is also shown in the figure. Which graph best describes the induced potential difference, , in loop 2 as a function of time, t? graph 1 graph 2 graph 3 graph 4

Q(R1): Which combination of resistors has the highest equivalent resistance? a) combination (a) b) combination (b) c) combination (c) d) combination (d) e) The equivalent resistance is the same for all four.