PHYS 2109 Pre And Post Labs Exam Study Guide
The north end of a compass in the Earth's magnetic field points towards the
geomagnetic --- pole, which is located near the Earth's geographic --- pole
Pr1 - ANSWER South, North
The south end of a compass in the Earth's magnetic field points towards the
geomagnetic --- pole, which is located near the Earth's geographic --- pole
Pr1 - ANSWER South, North
What instruments will you be using in lab?
Pr1 - ANSWER Compass, magnets
You will investigate the magnetic filed due to which of the following?
Pr1 - ANSWER (a) A coil of current-carrying wire
(b) Configurations with a single bar magnet
(d) Configurations with 2 bar magnets
Magnetic field lines always point in which direction?
Pr1 - ANSWER (a) Away from magnetic north poles
(c) Toward magnetic south poles
Recall the observed behavior of the compass during the mapping of the
magnetic field. Which of the following prescriptions best matches the behavior
you observed?
Ps1 - ANSWER (c) Where the field is strong, the compass needle readily and
quickly aligns with rapid oscillations around the equilibrium direction
(e) Where the field is weak, the compass needle slowly oscillates around the
final equilibrium position
Consider the various maps of the magnetic field lines that you created during
the lab. Which of the following best describes the relationship between how
closely spaced the field lines are and the strength of the magnetic field?
Ps1 - ANSWER (a) Where the lines are widely separated the field is weak
(c) Where the lines are closely packed together the field is strong
Recall the behavior of the compass needle as you explored the magnetic field
created by the coil. Indicate which two of the following five statements are true.
Ps1 - ANSWER (b) If I always move in the direction indicated by the compass
needle, thus following a given field line, my path will trace a loop going through
the inside of the coil and returning to my point of departure
, (e) As the compass enters one end of the coil, the needly aligns with the axis of
the coil and its orientation does not change as you move the compass along the
interior of the coil and exit at the other end
The figure shows some field lines connecting two magnets and may be similar to
one of the maps you obtained during lab activity. What are the magnetic
polarities of the poles labeled A, B, C, and D?
Ps1 - ANSWER A is S
B is N
C is S
D is N
Is it OK to turn the power on to the circuit before my TA checks it
Pr2 - ANSWER False
What are the units of current?
Pr2 - ANSWER Amperes
What are the units of potential difference?
Pr2 - ANSWER Volts
What are the units of resistance?
Pr2 - ANSWER Ohms
When making a graph, data plotted on the y axis should be the --- variable
Pr2 - ANSWER Dependent
When making a graph, data plotted on the x axis should be the --- variable
Pr2 - ANSWER Independent
According to Ohm's law, if you create a graph of current (I) vs potential
difference (V), you would expect a --- relationship
Pr2 - ANSWER Linear
Which of the following will you be directly measuring?
Pr2 - ANSWER Voltage, current
If you made a plot of current versus voltage and calculated a slope (0.0333 ±
0.0002222) A/V. What is the value of R assuming the data were plotted in MKS
units?
Ps2 - ANSWER R=300.30 ± 20.038 ohms
If you calculated 92± 3 Ohms and the manufacturer says it's 100 Ohms with a 5%
tolerance, does your data support the manufacturer's claim?
Ps2 - ANSWER Yes
The north end of a compass in the Earth's magnetic field points towards the
geomagnetic --- pole, which is located near the Earth's geographic --- pole
Pr1 - ANSWER South, North
The south end of a compass in the Earth's magnetic field points towards the
geomagnetic --- pole, which is located near the Earth's geographic --- pole
Pr1 - ANSWER South, North
What instruments will you be using in lab?
Pr1 - ANSWER Compass, magnets
You will investigate the magnetic filed due to which of the following?
Pr1 - ANSWER (a) A coil of current-carrying wire
(b) Configurations with a single bar magnet
(d) Configurations with 2 bar magnets
Magnetic field lines always point in which direction?
Pr1 - ANSWER (a) Away from magnetic north poles
(c) Toward magnetic south poles
Recall the observed behavior of the compass during the mapping of the
magnetic field. Which of the following prescriptions best matches the behavior
you observed?
Ps1 - ANSWER (c) Where the field is strong, the compass needle readily and
quickly aligns with rapid oscillations around the equilibrium direction
(e) Where the field is weak, the compass needle slowly oscillates around the
final equilibrium position
Consider the various maps of the magnetic field lines that you created during
the lab. Which of the following best describes the relationship between how
closely spaced the field lines are and the strength of the magnetic field?
Ps1 - ANSWER (a) Where the lines are widely separated the field is weak
(c) Where the lines are closely packed together the field is strong
Recall the behavior of the compass needle as you explored the magnetic field
created by the coil. Indicate which two of the following five statements are true.
Ps1 - ANSWER (b) If I always move in the direction indicated by the compass
needle, thus following a given field line, my path will trace a loop going through
the inside of the coil and returning to my point of departure
, (e) As the compass enters one end of the coil, the needly aligns with the axis of
the coil and its orientation does not change as you move the compass along the
interior of the coil and exit at the other end
The figure shows some field lines connecting two magnets and may be similar to
one of the maps you obtained during lab activity. What are the magnetic
polarities of the poles labeled A, B, C, and D?
Ps1 - ANSWER A is S
B is N
C is S
D is N
Is it OK to turn the power on to the circuit before my TA checks it
Pr2 - ANSWER False
What are the units of current?
Pr2 - ANSWER Amperes
What are the units of potential difference?
Pr2 - ANSWER Volts
What are the units of resistance?
Pr2 - ANSWER Ohms
When making a graph, data plotted on the y axis should be the --- variable
Pr2 - ANSWER Dependent
When making a graph, data plotted on the x axis should be the --- variable
Pr2 - ANSWER Independent
According to Ohm's law, if you create a graph of current (I) vs potential
difference (V), you would expect a --- relationship
Pr2 - ANSWER Linear
Which of the following will you be directly measuring?
Pr2 - ANSWER Voltage, current
If you made a plot of current versus voltage and calculated a slope (0.0333 ±
0.0002222) A/V. What is the value of R assuming the data were plotted in MKS
units?
Ps2 - ANSWER R=300.30 ± 20.038 ohms
If you calculated 92± 3 Ohms and the manufacturer says it's 100 Ohms with a 5%
tolerance, does your data support the manufacturer's claim?
Ps2 - ANSWER Yes
