PHYS 1260 COMPREHENSIVE EXAM UPDATED
QUESTIONS AND ANSWERS GRADED A+
✔✔the unit of electric charge, the Coulomb, is the charge on a - ✔✔specific large
number of electrons
✔✔fundamental charge - ✔✔e = 1.9 x 10^-19 C
✔✔when the distance between 2 charges is halved, what happens to the electrical force
between them? - ✔✔quadruples
✔✔Coulomb's Law - ✔✔Fe = k(q1)(q2)/r^2
✔✔the electric field between oppositely-charged parallel plates is - ✔✔uniform
✔✔to think of electric potential difference, we are thinking about - ✔✔voltage
✔✔am ampere is a unit of electric - ✔✔current
✔✔electrons flow in a wire when there is a - ✔✔a potential difference across its ends
✔✔a coulomb of charge flowing in a bulb filament powered by 6-volt battery is provided
with - ✔✔6 Joules
✔✔the current produced by voltage in a circuit is impeded by - ✔✔electric resistance
✔✔current in a conductor can be increased by ____ and ____ - ✔✔increasing the
voltage across it, reducing its resistance
✔✔unit for charge - ✔✔coulomb
✔✔couloumb constant (k) - ✔✔8.99 E+9 N-m^2/c^2
✔✔basic unit of charge - ✔✔e = 1.60 E-19 coulombs (C)
✔✔convention - ✔✔electric field lines point from + to -
✔✔electric potential - ✔✔energy per unit charge and is measured in volts
✔✔potential difference - ✔✔"voltage drop"
✔✔"voltage drop" or potential difference - ✔✔∆V = Va - Vb
, ✔✔change in position - ✔✔change in potential
✔✔capacitor - ✔✔Q = C∆V
✔✔unit of farads (F) - ✔✔1F = 1C/V
✔✔electric current - ✔✔the rate of flow of charge (e-) and is measured in amperes
✔✔electric current (more formally) - ✔✔I = ∆Q/∆t
✔✔ohms law - ✔✔R = ∆V/I
✔✔resistivity sign - ✔✔ρ
✔✔resistance - ✔✔R = ρ l/A
✔✔stretch causes increase in length leading to what in area and resistance -
✔✔decrease in area and increase in resistance
✔✔resistance based on tempertare - ✔✔R(T) = Ro[1 + α (T - To)]
✔✔Increase in R leads to ____ in T - ✔✔increase
✔✔If the charge is negative, the direction of F is simply - ✔✔reversed
✔✔the direction of the force exerted on a moving charge in a magnetic field is - ✔✔at
right angles to the direction of the motion
✔✔the radius of a charged particle's circular trajectory is - ✔✔proportional to its linear
momentum, mv
✔✔a beam of singly-charged ions entering a magnetic field are swept into circular
paths. the wider pather are those of - ✔✔the heavier ions
✔✔when the current reverses direction in a wire, the surrounding magnetic field -
✔✔also reverses direction
✔✔when a magnetic flux changes as a function of time, an electric field is - ✔✔induced
in the surrounding space
✔✔when a magnet is moved to and fro in a wire coil, voltage is induced. if the coil has
twice as many loops, the voltage induced is - ✔✔twice
QUESTIONS AND ANSWERS GRADED A+
✔✔the unit of electric charge, the Coulomb, is the charge on a - ✔✔specific large
number of electrons
✔✔fundamental charge - ✔✔e = 1.9 x 10^-19 C
✔✔when the distance between 2 charges is halved, what happens to the electrical force
between them? - ✔✔quadruples
✔✔Coulomb's Law - ✔✔Fe = k(q1)(q2)/r^2
✔✔the electric field between oppositely-charged parallel plates is - ✔✔uniform
✔✔to think of electric potential difference, we are thinking about - ✔✔voltage
✔✔am ampere is a unit of electric - ✔✔current
✔✔electrons flow in a wire when there is a - ✔✔a potential difference across its ends
✔✔a coulomb of charge flowing in a bulb filament powered by 6-volt battery is provided
with - ✔✔6 Joules
✔✔the current produced by voltage in a circuit is impeded by - ✔✔electric resistance
✔✔current in a conductor can be increased by ____ and ____ - ✔✔increasing the
voltage across it, reducing its resistance
✔✔unit for charge - ✔✔coulomb
✔✔couloumb constant (k) - ✔✔8.99 E+9 N-m^2/c^2
✔✔basic unit of charge - ✔✔e = 1.60 E-19 coulombs (C)
✔✔convention - ✔✔electric field lines point from + to -
✔✔electric potential - ✔✔energy per unit charge and is measured in volts
✔✔potential difference - ✔✔"voltage drop"
✔✔"voltage drop" or potential difference - ✔✔∆V = Va - Vb
, ✔✔change in position - ✔✔change in potential
✔✔capacitor - ✔✔Q = C∆V
✔✔unit of farads (F) - ✔✔1F = 1C/V
✔✔electric current - ✔✔the rate of flow of charge (e-) and is measured in amperes
✔✔electric current (more formally) - ✔✔I = ∆Q/∆t
✔✔ohms law - ✔✔R = ∆V/I
✔✔resistivity sign - ✔✔ρ
✔✔resistance - ✔✔R = ρ l/A
✔✔stretch causes increase in length leading to what in area and resistance -
✔✔decrease in area and increase in resistance
✔✔resistance based on tempertare - ✔✔R(T) = Ro[1 + α (T - To)]
✔✔Increase in R leads to ____ in T - ✔✔increase
✔✔If the charge is negative, the direction of F is simply - ✔✔reversed
✔✔the direction of the force exerted on a moving charge in a magnetic field is - ✔✔at
right angles to the direction of the motion
✔✔the radius of a charged particle's circular trajectory is - ✔✔proportional to its linear
momentum, mv
✔✔a beam of singly-charged ions entering a magnetic field are swept into circular
paths. the wider pather are those of - ✔✔the heavier ions
✔✔when the current reverses direction in a wire, the surrounding magnetic field -
✔✔also reverses direction
✔✔when a magnetic flux changes as a function of time, an electric field is - ✔✔induced
in the surrounding space
✔✔when a magnet is moved to and fro in a wire coil, voltage is induced. if the coil has
twice as many loops, the voltage induced is - ✔✔twice
