Electric Motors and Generators

In what units is the voltage of electric motors measured?

• Ampere

• Pendants

• Voltacр

• Hertz

• Newtons

What is the electric current produced by generators?

• Water flow in the river

• Wind flow in the air

• Directed movement of electrons

• Attractive force

• Division of atoms into electrons, protons and neutrons

What device is used to measure the electric current of electric motors?

• Ammeter

• Voltmeter

• Wattmeter

• Phase meter

• Kenetron

Commutator motors allow:

• Reduce engine dimensions

• Reduce electrical energy losses

• Smoothly change the rotor speed

• Increase speed

• Reduce speed

Commutator motors are used:

• In the electric drive of machine tools

• In car starters

• In refrigerators

• In electric transport devices

• On wind generators

To convert alternating current to direct current, -

• Engines

• Generators

• Rectifiers

• Heating devices

• Lighting fixtures

The rotors of commutator and asynchronous motors rotate under the influence of interaction forces:

• Stator current and rotor current

• Stator current and rotor voltage

• Stator voltage and rotor voltage

• Magnetic field of the stator with current in the winding from the rotor

• Voltage at the motor input and current in the rotor winding

Scope of application of asynchronous motors:

• Electric drive

• Electric traction

• For lighting purposes

• For heating purposes

• As transformers

Technical devices that use the electromagnetic action of electric current:

• Electric motors and generators

• Lighting fixtures

• Heating devices

• Power lines

• Fuses

What is the electric current produced by generators?

• Water flow in the river

• Wind flow in the air

• Directed movement of electrons

• Attractive force

• Division of atoms into electrons, protons and neutrons