EXERCISES

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3.- POWER SOURCE: It is a component of electric circuits in which the eleement feeds the circuit with the electrical energy needed to move the electrons.
CONDUCTOR: It is a component of electric circuits in which the elements transport the electric current from the power sources to the load devices.
LOAD DEVICE: It is a component of electric circuits in which the elements contained, receive the electrical energy from the power sources. It includes: motors, lamps, resistors, etc

4.- They are: power sources, load devices, conductors and control ande protection elements.

5.-  Copper and gold

6.-  A) The resistance is of 30 OHMS.
      B) The value of the resistor in the inicial circuit is of 15 OHMS.

7.-  If lamp 1 blows in circuit number 1, it will interrupt the circuit.

ELECTRIC CIRCUITS

On these days, we have been working on doing some electric circuits, such as: parallel and series circuits.

In parallel circuits we have used a battery 4.5V and resistors of 220Ω and three LEDS, one was red, the other was green and the other was yellow.

In series circuits we have used a battery of 9V, because with the battery of 4.5V, we didn´t have enough volts. We have also used three resistors of 220Ω and three LEDS, with the same colours.

We have observed that in parallel circuits, if you take out one resistor and one LED, it works, but in series circuits, it doesn´t work.

Here we leave you a photo of the series circuit we have done: