NEIEP 400 FINAL EXAM ACTUAL QUESTIONS AND
SOLUTIONS GRADED A+
✔✔The magnetic field created when current flows through a wire is in the form of -
✔✔Concentric circles
✔✔The direction of the magnetic field around the wire depends on the direction of -
✔✔Current flow
✔✔The direction of the magnetic field around the wire can be determined by using the -
✔✔Left-hand rule
✔✔A number of loops wound in the same direction form a - ✔✔coil
✔✔When using the left-hand rule for coils, your BLANK points to the north pole. -
✔✔Thumb
✔✔When a conductor moves to cut across flux lines in a magnetic field, an EMF is
BLANK in the conductor. - ✔✔Induced
✔✔Induced EMF will cause current to flow if the ends of the conductor are connected in
a BLANK - ✔✔Closed Circuit
✔✔The three factors which determine the strength of induced EMF are the speed that
the conductor is cutting lines, the strength of the magnetic field, and the BLANK in the
coil. - ✔✔Number of turns
✔✔The BLANK of the induced EMF is determined by the relative direction of motion
between the magnetic field and the
conductor. - ✔✔Polarity
✔✔Using the left-hand rule for generators, the thumb points in the direction of -
✔✔Motion
✔✔Using the left-hand rule for generators, the forefinger points in the direction of -
✔✔Magnetic Field
✔✔Using the left-hand rule for generators, the middle finger points in the direction of the
BLANK caused by induced EMF. - ✔✔Electron Flow
✔✔TRUE OR FALSE An elementary generator consists of a loop of wire rotating in a
stationary magnetic field. - ✔✔True
, ✔✔14. The loop of wire which rotates through the field is called the BLANK -
✔✔Armature
✔✔TRUE OR FALSE The current does not depend upon the position of the loop in the
magnetic field. - ✔✔False
✔✔If a conductor is moving parallel to the magnetic field, EMF IS OR IS NOT
generated. - ✔✔Is not
✔✔(position B) the loop is cutting MAXIMUM/MINIMUM flux lines. - ✔✔Maximum
✔✔TRUE OR FALSE An EMF is induced in both sides of the loop. - ✔✔True
✔✔The direction of current flow and polarity of the induced EMF depend upon the
BLANK of the armature loop rotation
and BLANK of the magnetic field. - ✔✔Direction; Polarity
✔✔TRUE OR FALSE An AC voltage is defined as a voltage which remains at the same
polarity output at all times. - ✔✔False
✔✔The elementary generator described in the text produces BLANK current and
voltage. - ✔✔Alternating
✔✔The elementary generator described in the text CAN/CANNOT be modified to
produce DC rather than AC. - ✔✔Can
✔✔The slip rings of the elementary generator are converted to a BLANK to produce a
DC output. - ✔✔Commutator
✔✔TRUE OR FALSE The DC output of the elementary generator is a pulsating DC
voltage. - ✔✔True
✔✔The variation in the output of a DC generator is known as - ✔✔Ripple
✔✔In order to produce a smoother form of DC, the elementary DC generator must be
modified by adding BLANK - ✔✔Armature loops or coils
✔✔n order to produce a higher output voltage , more BLANK are added. - ✔✔Turns per
coil
✔✔In a DC motor, the brushes are connected to a DC voltage BLANK - ✔✔Source
SOLUTIONS GRADED A+
✔✔The magnetic field created when current flows through a wire is in the form of -
✔✔Concentric circles
✔✔The direction of the magnetic field around the wire depends on the direction of -
✔✔Current flow
✔✔The direction of the magnetic field around the wire can be determined by using the -
✔✔Left-hand rule
✔✔A number of loops wound in the same direction form a - ✔✔coil
✔✔When using the left-hand rule for coils, your BLANK points to the north pole. -
✔✔Thumb
✔✔When a conductor moves to cut across flux lines in a magnetic field, an EMF is
BLANK in the conductor. - ✔✔Induced
✔✔Induced EMF will cause current to flow if the ends of the conductor are connected in
a BLANK - ✔✔Closed Circuit
✔✔The three factors which determine the strength of induced EMF are the speed that
the conductor is cutting lines, the strength of the magnetic field, and the BLANK in the
coil. - ✔✔Number of turns
✔✔The BLANK of the induced EMF is determined by the relative direction of motion
between the magnetic field and the
conductor. - ✔✔Polarity
✔✔Using the left-hand rule for generators, the thumb points in the direction of -
✔✔Motion
✔✔Using the left-hand rule for generators, the forefinger points in the direction of -
✔✔Magnetic Field
✔✔Using the left-hand rule for generators, the middle finger points in the direction of the
BLANK caused by induced EMF. - ✔✔Electron Flow
✔✔TRUE OR FALSE An elementary generator consists of a loop of wire rotating in a
stationary magnetic field. - ✔✔True
, ✔✔14. The loop of wire which rotates through the field is called the BLANK -
✔✔Armature
✔✔TRUE OR FALSE The current does not depend upon the position of the loop in the
magnetic field. - ✔✔False
✔✔If a conductor is moving parallel to the magnetic field, EMF IS OR IS NOT
generated. - ✔✔Is not
✔✔(position B) the loop is cutting MAXIMUM/MINIMUM flux lines. - ✔✔Maximum
✔✔TRUE OR FALSE An EMF is induced in both sides of the loop. - ✔✔True
✔✔The direction of current flow and polarity of the induced EMF depend upon the
BLANK of the armature loop rotation
and BLANK of the magnetic field. - ✔✔Direction; Polarity
✔✔TRUE OR FALSE An AC voltage is defined as a voltage which remains at the same
polarity output at all times. - ✔✔False
✔✔The elementary generator described in the text produces BLANK current and
voltage. - ✔✔Alternating
✔✔The elementary generator described in the text CAN/CANNOT be modified to
produce DC rather than AC. - ✔✔Can
✔✔The slip rings of the elementary generator are converted to a BLANK to produce a
DC output. - ✔✔Commutator
✔✔TRUE OR FALSE The DC output of the elementary generator is a pulsating DC
voltage. - ✔✔True
✔✔The variation in the output of a DC generator is known as - ✔✔Ripple
✔✔In order to produce a smoother form of DC, the elementary DC generator must be
modified by adding BLANK - ✔✔Armature loops or coils
✔✔n order to produce a higher output voltage , more BLANK are added. - ✔✔Turns per
coil
✔✔In a DC motor, the brushes are connected to a DC voltage BLANK - ✔✔Source
