Electric current and cells

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

• Electrochemical cells

• Electric generator

• Electric power station

• Electric motor

In the electric cell, the...... Energy is converted into electric energy

• Kinetic

• Magnetic

• Chemical

• Mechanical

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

• Dry cell

• Dynamo

• Dry battery

• All the previous

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

• Magnetic

• Kinetic

• Chemical

• Light

All of the following are from the properties of alternating current except, it.........

• Is unidirectional & has constant intensity

• is variable in both directions and intensity

• can be converted into direct current

• can be transferred for long distance

On connecting 5 electric cells, the e. m. f. of each one is 2.5volt in parallel the total e. m. f. of the new battery equal..... Volt

• 2.5

• 5

• 7.5

• 12.5

A group of similar cells which are connected in parallel makes a battery of e. m. f................

• greater than the e. m. f. Of one cell

• equal to the e. m. f. Of one cell

• smaller than the e. m. f. of one cell

• there's no correct answer

E=nE1is the law to get the e. m. f. Of............

• One dry cell

• Similar cells connected in series

• Similar cells connected in parallel

• a cell of e. m. f. equal n.

Study the figure, then answer the questions

a) The type of this current

Study the figure, then answer the question :

The cells are connected in.....