Transformers, Motors, Generators

Select all that apply to an electric motor.

• creates mechanical energy

• uses electricity

• uses mechanical energy

• creates electricity

Select the main parts of an electric motor.

• stator

• commutator

• rotor

• plenum

Select all that apply to a generator.

• creates mechanical energy

• uses electricity

• uses mechanical energy

• creates electricity

A generator creates electricity by rubbing two magnets together.

• true

• false

According to the right hand rule, if your fingers wrap around a current carrying wire in the direction of the magnetic field, current goes in the direction of ___.

• your pinky finger

• your pointer finger

• your left hand

• your thumb

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Step down transformers, like those commonly found in phone chargers, are used to do what?

• increase magnetism

• Speed up current

• Reduce resistance

• Decrease voltage

Where is there a step up transformer in the power grid?

• At a house

• By the generating station

• At a substation

• At a primary customer

Why is a transformer necessary outside of your home?

• To increase current

• To decrease voltage to 110

• To create static electricity

• To increase voltage to 600 kV

All transformers contain what main part(s)?

• A large magnet

• A stator

• A rotor

• Primary and secondary coils

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

If the primary coil in a coil has 1000 turns of wire and the secondary coil has 100 turns of wire, the transformer will change 110 V to ___.

• 220 V

• 11 V

• 1100 V

• 5 V