Motor Action and Torque Quiz

The right-hand motor rule is usually used to determine __________

• flux density.

• the direction of conductor movement.

• conductor speed.

• flux direction.

• induced current.

In Figure 14-9, conductor movement will be __

• upward.

• downward.

• to the right.

• to the left.

• constant.

Torque on a single loop of wire in a magnetic field is __________

• constant.

• strength.

• the same as field flux.

• the turning force.

• never at a maximum value.

The amount of torque on a current-carrying conductor in a __________ magnetic field depends upon

• the amount of current in the conductor.

• the direction of the magnetic field between the two poles.

• the current direction in the conductor.

• the direction of rotation.

• the left-hand rule.

To obtain motor action, current is supplied to a loop of wire __________ in a magnetic field by

• slip rings.

• split rings.

• a commutator.

• brushes.

• brushes and a commutator.

If another loop of wire is added to make a double-loop armature, __________

• the torque becomes steadier.

• the magnetic field decreases in value.

• loop current direction is affected.

• the torque becomes less smooth.

• commutator segments must be reduced in number.

The principle of motor action is __________

• a conversion of mechanical energy to electrical energy.

• a conversion of chemical energy to electrical energy.

• a conversion of electrical energy to mechanical energy.

• an unpredictable phenomenon.

• predictable with the left-hand rule.

Torque in a motor is a function of field flux and conductor flux. How can conductor flux be increased?

A motor is used to convert electrical energy to mechanical energy. True or false?

Can the right-hand rule be used to determine the direction of lines of force?