A wire carrying conventional current to the right experiences an
upward force from an external magnetic field. In what direction is
the magnetic field pointing?
a. downward b. out of the page c. in to the page d.
upward.
A voltmeter can be created with a galvanometer by doing which of
the following? a. placing it in series with a resistor of very high
resistance b. placing it in parallel with a resistor of very high
resistance c. placing it in series with a resistor of very low
resistance d. placing it in parallel with a resistor of very low
resistance
Which of the following devices allowed for the technological
advancement from the galvanometer to the DC motor? a. split ring
commutator b. superconducting wire c. ohmmeter d. alternating
magnets
For a single loop DC motor, the magnetic force on the wire loop
is strongest when the plane of the loop is oriented in which of the
following positions? a. perpendicular to the magnetic field b.
parallel to the magnetic field c. rotated 45 clockwise from
parallel of the magnetic field d. rotated 45 counterclockwise from
parallel of the magnetic field