Current Electricity

Question 1

What is the current electricity?

Answer 1

It is the continuous flow charge

Question 2

What does you call a group of electrons?

Answer 2

Coloumb

Question 3

What do electrical currents do?

Answer 3

Transfer energy thats why a light bulb can glow

Question 4

What is required for a current to flow

Answer 4

• a source of electrical energy
• closed circuit
• conductors in a circuit

Question 5

What components must be attached to each other?

Answer 5

• from the one terminal of cell / battery
• along wires or conductors
• through the filament of incandescent bulbs or other components
• back to the other terminal of the cell / better

Question 6

What is the minimum components in a circuit?

Answer 6

• a source of energy
• conductors
• something to give an indication that the current is flowing

Question 7

What are connecting wires

Answer 7

• made from metals that are good conductors

- transfer electrical charges over short or long distances

Question 8

What is a battery?

Answer 8

is a combination of more that on cell connector in series

Question 9

How do a battery work?

Answer 9

cells have chemical energy
the chemical energy only reacts when a circuit is completed
it is converted into electrical energy
the electrical energy charges is delivered to the circuit

Question 10

What does the cell create?

Answer 10

a potential difference (tension) by supplying electrical kinetic energy to electrical energy charges

Question 11

What is a switch

Answer 11

used to open and close circuit

Question 12

Name reasons why a circuit can be incomplete

Answer 12

• open switch
• a loose contact of the switch
• a broken wire
• a broken filament in the bulb

Question 13

What is a resistor

Answer 13

is a circuit component that offer resistance against the flow of charge

Question 14

What does a resistor have a effect on?

Answer 14

magnitude of the electrical current

Question 15

The higher the resistance?

Answer 15

the weaker the current

Question 16

How does a old fashioned light bulb work?

Answer 16

• There’s a resistor wire connected to 2 contact points
• One part connected to screw part
• other part connected to a knob at the bottom
• Filament heats up until it is white hot
• electrical energy converted to heat energy

Question 17

What are the effects of an electrical current?

Answer 17

• heating effect
• magnetic effect
• chemical effect

Question 18

What does the electrical current transfer?

Answer 18

Particles in the conductor

Question 19

What does a filament of a bulb have?

Answer 19

• high resistance

- does not melt easily

Question 20

What is a short circuit?

Answer 20

When the electrical current takes the path of lowest resistance

Question 21

What are fuses?

Answer 21

Spesial wires that melt if the circuit overheat

Question 22

Why is a current broken?

Answer 22

The fuse melt

Question 23

What is the magnetic effect?

Answer 23

A current -carrying conductor causes a magnetic field around the conductor

Question 24

What happen when there is no current?

Answer 24

The compass needle return to the north - south direction

Question 25

What happen when a current flous through a conductor

Answer 25

It effect the needle of a compass close to it

Question 26

How do you change an electromagnet into a stronger magnet?

Answer 26

• connect more cells in series in the circuit
• place a nail in the coil
• use a steel nail instead of a iron nail

Question 27

What is the decomposition of a chemical compound by means of electrical current called?

Answer 27

Electrolysis

Question 28

What is the solution in which electricity is conducted in?

Answer 28

Electrolyte

Question 29

What is the anode?

Answer 29

The electrode connected to the positive terminal of the battery

Question 30

What is the cathode?

Answer 30

The electrode connected to the negative terminal of the battery

Question 31

What can electrolysis be used for?

Answer 31

• break-up water into hydrogen and oxygen

- break-up copper chloride solution into copper metal at the cathode and chlorine gas at the anode