Physics 212 Final Sample Exam Form A1. A point charge q is located at position A, a distance r away from a point charge Q. The charge qis moved to position B, which is also located a distance r away from the charged particle Q.Which of the following statements is correct?A. The work done by the electric field in moving the charged particle from A to B is2ABkQqWr=B. The work done by an outside force in moving the charged particle from A to B is2ABkQqWr=C. The work done by the electric field in moving the charged particle from A to B is 0ABW=D. The work done by the electric field in moving the charged particle from A to B isABkQqWr=E. The work done by an outside force in moving the charged particle from A to B isABkQqWr=2. A very small styrofoam sphere with charge +2C is held 1 mm above the center of a chargedconducting sheet of size 1 m x 1 m. The sphere experiences a repulsive force of 2 N. What canwe say about the local charge density at the center of the sheet?A. The local charge density is -8.85 x 10-12 C/m2.B. The local charge density is +8.85 x 10-12 C/m2.C. The local charge density is +1.12 x 10-11 C/m2.D. The local charge density is -1.77 x 10-11 C/m2.E. We cannot say anything since we don’t have enough information about the chargedistribution on the sheet.Page 1Physics 212 Final Sample Exam Form A3. The figure shows 3 extremely long straight, parallel wires carrying currents of equal magnitude inthe directions indicated. What is the direction of the net force on the wire located at the origin? A. ˆˆParallel to the vector xy++B. ˆˆParallel to the vector xy+−C. ˆˆParallel to the vector xy−+D. ˆˆParallel to the vector xy−−E. The net force is zero.4. The light bulbs in the circuit are identical. When the switch is closed,A. both bulbs go out.B. the intensity of light bulb A increases.C. the intensity of light bulb A decreases.D. the intensity of light bulb B increases.E. nothing changes.Page 2Physics 212 Final Sample Exam Form A5. The figure shows a phasor diagram for a series RLC circuit. Which of the following statements iscorrect? (Note that the figure is drawn to scale.)A. The drive frequency is below the resonance frequency, V1 is the voltage drop across theresistor, V2 is the voltage drop across the inductor, and V3 is the voltage drop across thecapacitor.B. The drive frequency is below the resonance frequency, V1 is the voltage drop across theinductor, V2 is the voltage drop across the resistor, and V3 is the voltage drop across thecapacitor.C. The drive frequency is above the resonance frequency, V1 is the voltage drop across theresistor, V2 is the voltage drop across the inductor, and V3 is the voltage drop across thecapacitor.D. The drive frequency is above the resonance frequency, V1 is the voltage drop across theinductor, V2 is the voltage drop across the resistor, and V3 is the voltage drop across thecapacitor.E. The drive frequency is above the resonance frequency, V1 is the voltage drop across thecapacitor, V2 is the voltage drop across the resistor, and V3 is the voltage drop across theinductor .6. A capacitor is fully charged using a battery of EMF E. It is then disconnected from the batteryand connected across an inductor in an ideal LC circuit. Which of the following statements iscorrect?A. The capacitor and the inductor will dissipate the same (non-zero) amount of energy in eachcycle of oscillation.B. The value of the inductor determines the value of the maximum charge stored on thecapacitor.C. The value of the maximum charge stored on the capacitor determines the value of themaximum current through the inductor.D. When the current in the LC circuit is zero, there is no charge on the capacitor.E. The EMF of the battery determines the amount of energy dissipated in each cycle ofoscillation.Page 3Physics 212 Final Sample Exam Form A7. In the circuit shown, the switch is closed at t = 0. Which of the graphs below correctly representsthe current in the 20 Ω resistor as a function of time? (The origin of the each graph is (0,0).) A. AB. BC. CD. DE. EPage 4Physics 212 Final Sample Exam Form A8. In the figure, the magnetic field within the circular area is into the page, is uniform and isincreasing at a constant rate. The magnetic field outside the circular area is zero. UseFaraday’s Law to determine which graph correctly depicts the magnitude of electric field E(r),where r is the distance from the center of the circle. The radius of the circular area is R.r = R r(B)E(r) (C)r = RrE(r) (D) r E(r) r = R (A) E(r) r = R r (E)E(r) rr = RA. AB. BC. CD. DE. E9. What is the value of the current i5 in the following configuration: i1 = 6A i2 = 7A i3 = 6A i4 = 6A A. -13 AB. -1 AC. 1 AD. 13 AE. 25 APage 5Physics 212 Final Sample Exam Form A10. The Curie temperature of iron is around 800 ºC. Which of the following statements is correct?A. Iron is a ferromagnet above 800 ºC.B. Iron is a paramagnet below 800 ºC.C. Iron is a superconductor above 800 ºC.D. Iron is a ferromagnet below 800 ºC.E. Iron is a ferromagnet at all temperatures.11. On a computer chip, two conducting interconnects carry charge from P to Q and from R to S. Ifthe current direction is reversed in both wires, the net magnetic force of strip 1 on strip 2:A. remains the same.B. reverses.C. changes in magnitude, but not in direction.D. changes to some other direction.E. none of the above.12. A battery establishes a steady current around the circuit below. A compass needle is placedsuccessively at points P, Q, and R. The relative deflection of the needle, in descending order, is: P Q RA. P, Q, RB. Q, R, PC. R, Q, PD. P, R, QE. Q, P, RPage 6Physics 212 Final Sample Exam Form A13. A capacitor, resistor and inductor are connected in parallel across an ac source of EMF givenby E = Emsin(ωt). A student constructs a phasor diagram representing the currents in the threecomponents (labelled as IC , IR and IL, for the capacitor, resistor and inductor respectively).Which of the figures below could correctly depict a phasor representation of this circuit? A. AB. BC. CD. DE. E14. The figure shows plots of charge versus potential difference for three parallel-plate capacitors,which have the following plate areas and separations: C1 has area of A and a separation of 2d. C2 has area of 2A and a separation of 2d. C3 has area of A and a separation of 4d. Which of the following