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Puzzle:
Puzzle:
Peter and Tina, dedicated physics students decided to set up a laser light show for the Mole Week Party! Unfortunately, in their infinite wisdom, they messed up all the circuitry... Who knows what all of this stuff does?? Solve the problems to save the party!
Peter and Tina, dedicated physics students decided to set up a laser light show for the Mole Week Party! Unfortunately, in their infinite wisdom, they messed up all the circuitry... Who knows what all of this stuff does?? Solve the problems to save the party!
Oddly enough, one of the power supplies has malfunctioned to provide exactly 4.775V. Using the diagram below, solve for the total electric potential energy at equilibrium once switch 1 is opened and switch 2 is closed.
Oddly enough, one of the power supplies has malfunctioned to provide exactly 4.775V. Using the diagram below, solve for the total electric potential energy at equilibrium once switch 1 is opened and switch 2 is closed.
2. Luckily, another piece of circuitry is intact, but the battery is unrecognizable. What is the proper voltage for the battery?
2. Luckily, another piece of circuitry is intact, but the battery is unrecognizable. What is the proper voltage for the battery?
3. Assuming the available battery has an internal resistance of 12.22 ohms, what is the EMF of the battery (to the nearest Volt)?
3. Assuming the available battery has an internal resistance of 12.22 ohms, what is the EMF of the battery (to the nearest Volt)?
4. Three loops of equal radii carrying equal currents lie on planes parallel to the yz-plane as shown in Figure 17.22. Two of the loops are located equal distances d from the yz-plane as shown, while the third loop lies on the yz-plane. In what direction is the net magnetic field at the origin?
4. Three loops of equal radii carrying equal currents lie on planes parallel to the yz-plane as shown in Figure 17.22. Two of the loops are located equal distances d from the yz-plane as shown, while the third loop lies on the yz-plane. In what direction is the net magnetic field at the origin?
A. The magnetic field is in the +x-direction
A. The magnetic field is in the +x-direction
B. The magnetic field is in the -x-direction
B. The magnetic field is in the -x-direction
C. The magnetic field is zero because of symmetry
C. The magnetic field is zero because of symmetry
D. The magnetic field lies in the xz-plane
D. The magnetic field lies in the xz-plane
E. The magnetic field lies in the xy-plane
E. The magnetic field lies in the xy-plane
Solution: The first one is 0.76 J. Second is 12 V, third is 23 V and fourth is A. Converting 76 to ASCII is L, and 12 and 23 are alphanumeric for L and W. Putting the four together gives WALL, or Mrs. Wall.
Solution: The first one is 0.76 J. Second is 12 V, third is 23 V and fourth is A. Converting 76 to ASCII is L, and 12 and 23 are alphanumeric for L and W. Putting the four together gives WALL, or Mrs. Wall.
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