Electric Motor

Which of these pairs of devices operate in reverse of each other?

• generator and motor

• generator and electromagnet

• motor and electromagnet

• electromagnet and resistor

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

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

Electric motors are devices that convert _____ energy into  _____ energy.

• electrical; mechanical

• mechanical; electrical

• chemical; potential

• mechanical; kinetic

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

NGSS.HS-PS3-5

The brushes in an electric motor

• the split rings that rotate in a motor

• the coil that create the electromagnetic field

• Are spring loaded connectors that carry electricity to the rotor by brushing against the commutator as it rotates

• the magnets surrounding the rotor

Why might a current-carrying wire be placed between a magnetic field?

• To increase the current from the interaction of magnetic fields

• To increase the voltage from the interaction of magnetic fields

• To produce a force from the interaction of magnetic fields

Tags

NGSS.HS-PS2-5

What angle must there be between a magnetic field and a conductor in order for the maximum force to be exerted?

• 180

• 45

• 90

• 270

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

An electric motor is a device that converts _____ energy into _____ energy.

• Electrical

  Inertia

• Electrical

  Mechanical

• Mechanical

  Electrical

• Potential

  Kinetic

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

NGSS.HS-PS3-5

The ______ is the part of the motor that remains unmoving and creates an electrical field.