unit 2 lesson2 second term prep3

Direct current can be produced from ..........

• electrochemical cells.

• electric generators.

• electric power stations.

• electric motors.

Direct current can be produced from ..........

• electrochemical cells.

• electric generators.

• electric power stations.

• electric motors.

The instrument which is used to convert chemical energy into electric energy is ...........

• electric cell

• dynamo

• motor

• electromagnet

In dynamo, .......... energy is converted into electric energy.

• magnetic

• kinetic

• chemical

• light

To generate an alternating electric current, we use the ...................

• dry cell

• dynamo

• ohmmeter

• voltmeter.

...................................is Used to produce direct electric current.

• Dynamo

• Rheostat

• Ammeter

• Dry cell

The electric current that is produced from the dynamo is .........

• an alternating current that cannot be converted into direct current.

• a direct current that can be converted into alternating current.

• an alternating current that can be converted into direct current.

• .a direct current that cannot be converted into alternating current.

All of the following are from the properties of direct current, except .............

• is unidirectional

• has constant intensity.

• can be transferred to short distances

• can be converted to alternating current.

....................... is used in electroplating process.

• Electric generator

• Electric cell

• Electric cell

  . Electric motor

• Electromagnet

One of the properties of the direct current is .....................

• change value

• change direction

• constant value and direction

• change value and direction.