EXERCISES:

P.131

    3. Define these concepts :

1.    The power source is acomponent that supplies electrical energy to the rest of the circuit(batteries)
2. The conductor is component that transports the electrical energy from teh power source to the load devices (cables) .
3. The looad device in a com`ponent that recives the electrical energy from the power source and converts it to other types of useful energy (leds or resistances).

  4. List all  the control and proteccion  devices that you can think of and of and explain what they do:

1. One-way switch:open or close the circuit when they are actuated
2. Push switch:they open or close the circuit, but only while we keep them pressed.
3. Two-way switch:they open and close one or more circuits. They can also open some circuits and close other ones.
4. Limit switch:it functions as a switch that toggles between two positions when it is operated by a lever.

      

      5. Which materials are used to make an electric wire (in side out)?  :

1.  Out is made o plastic an i😈nside is made of copper. 

   6. We know thata the circuit in figure below is the equivalent to a circuit of two identical resistors connected in series, that the cell is 9V and that thar current flowing through the circuit is 0.3 mA:
            
         a. Calculate the value of the equivalent resistor.
         b. Calculate the value of resistors in the initial circuit
         c. Draw the initial circuit

   7. Study the following 2 circuits. If lamp 1 blows in each circuit, how would this affect their operation?