PHYS 1260 FINAL EXAM ACTUAL QUESTIONS AND
ANSWERS GRADED A+
✔✔surrounding every moving electron is - ✔✔a magnetic field and an electric field
✔✔The shape of a magnetic field surrounding a current-carrying conductor is -
✔✔circular
✔✔If you drop a bar magnet in a vertical copper pipe it will fall slowly because - ✔✔it
induces a magnetic field in the pipe that resists motion of the magnet
✔✔disconnect a small voltage battery from a coil of many loops of wire and a large
voltage may be produced by - ✔✔the sudden collapse in magnetic field
✔✔the voltage involved in self induction is - ✔✔- always in opposite direction of the
changing voltage that produced it
- likely higher than the changing voltage that caused it
✔✔Underlying the concept of self-induction is - ✔✔faradays law
✔✔ current flows in the____direction - ✔✔positive
✔✔when two light bulb are connected in SERIES to a battery, the electrical resistance
that the battery senses is - ✔✔more than the resistance of either light bulb
✔✔when two light bulbs are connected in parallel to a battery, the resistance the battery
senses is - ✔✔less than the resistance of either light bulb
✔✔when magnetic flux changes as a function of time, an ______________ is induced
in the surrounding space - ✔✔electric field
✔✔What does the negative sign in Faraday's law account for? - ✔✔nature opposes
change
✔✔magnetic flux serves as an important hook into how nature seeks _______ in
electromagnetism - ✔✔equilibrium
✔✔induced voltage opposes a change in... - ✔✔magnetic flux
✔✔Lenz's Law - ✔✔electromagnetic induction opposes a change in the magnetic flux
- + means CCW current
- negative means CW current
ANSWERS GRADED A+
✔✔surrounding every moving electron is - ✔✔a magnetic field and an electric field
✔✔The shape of a magnetic field surrounding a current-carrying conductor is -
✔✔circular
✔✔If you drop a bar magnet in a vertical copper pipe it will fall slowly because - ✔✔it
induces a magnetic field in the pipe that resists motion of the magnet
✔✔disconnect a small voltage battery from a coil of many loops of wire and a large
voltage may be produced by - ✔✔the sudden collapse in magnetic field
✔✔the voltage involved in self induction is - ✔✔- always in opposite direction of the
changing voltage that produced it
- likely higher than the changing voltage that caused it
✔✔Underlying the concept of self-induction is - ✔✔faradays law
✔✔ current flows in the____direction - ✔✔positive
✔✔when two light bulb are connected in SERIES to a battery, the electrical resistance
that the battery senses is - ✔✔more than the resistance of either light bulb
✔✔when two light bulbs are connected in parallel to a battery, the resistance the battery
senses is - ✔✔less than the resistance of either light bulb
✔✔when magnetic flux changes as a function of time, an ______________ is induced
in the surrounding space - ✔✔electric field
✔✔What does the negative sign in Faraday's law account for? - ✔✔nature opposes
change
✔✔magnetic flux serves as an important hook into how nature seeks _______ in
electromagnetism - ✔✔equilibrium
✔✔induced voltage opposes a change in... - ✔✔magnetic flux
✔✔Lenz's Law - ✔✔electromagnetic induction opposes a change in the magnetic flux
- + means CCW current
- negative means CW current
