DC Motor Questions

Which rule can be used to work out which way a coil of wire rotates in a motor?

• Fleming's left-hand rule

• Fleming's right-hand rule

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Give two ways you can reverse the direction of a basic dc motor?

• Reverse the current

• Keep the current the same

• Reverse the magnetic field

• Keep the magnetic field the same

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

How does a split ring commutator work?

• Swaps the contact evert full turn, so that the left-hand and right-hand arms of the coil always experience a force in the same direction.

• Swaps the contact evert half turn, so that the left-hand and right-hand arms of the coil do not experience a force in the same direction.

• Swaps the contact evert half turn, so that the left-hand and right-hand arms of the coil always experience a force in the same direction.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Name one factor that does not affect the size of a force in on a current-carrying conductor placed in a magnetic field?

• Gravity

• Magnetic flux density/size of magnetic field

• Size of the current

• Length of the conductor

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which part (s) of the DC motor connect the power supply to the split-ring and coil?

• Carbon brushes

• Magnets

• Commutator

• Slip rings

The motion in DC motor can be increased by the following factors... (you may choose more than one)

• Using a stronger magnet

• Increasing the potential difference

• Increasing the current

• Increasing the number of turns on the coil

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-5

The operation of Commutator in DC Motor is

• to convert dc to ac

• to convert ac to dc

• to convert fixed dc to variable dc

What it is?

• Armature

• Commutator

• Brush

• Magnet

Tags

NGSS.HS-PS2-5

What does the Thumb indicates?

• current direction

• motion of conductor

• direction of Field flux

Tags

NGSS.HS-PS2-5

A wire hangs between the poles of a magnet.
When there is a current in the wire, in which direction does the wire move?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5