#### Technology 1-2 ESO – Unit 10 ELECTRICAL CIRCUITS extra activities

1 –  Watch the video on “Introduction to Simple Circuits” and answer:

• a) What can electrons do when they move?
• b) How is the light attached to the battery?
• c) What are the components of the circuit?
• d) How do we call the electrons when they move through the loop?
• e) What does the battery provide?
• f) In what direction do electrons move?
• g) What is the function of the wires?
• h) What happens if there is a break in the circuit?
• i) What is the function of the switch?

2 –  Look at the images and answer:

a)  Name the electrical elements in this circuit.

b)  Is this a parallel or a series circuit? Why?

c)  Draw the circuit diagram.

d)  If we open switch 1, what happens to light bulb 1?

e)  If only switch 2 is closed. Will light bulb 2 shine more? Why?

f)  If only switch 2 is closed. Is there a risk of light bulb 2 blowing? Why?

g)  Is this a parallel or a series circuit? Why?

3 –  Match the magnitude name with its magnitude symbol, unit name and unit symbol:

4 –  Use Ohm’s Law to calculate and fill in the gaps:

5 –  A circuit has a battery that provides a tension of 12 V. The circuit has a light bulb with a resistance of 6 Ω

What is the current intensity in the circuit?

6 –  A circuit has a battery that provides a tension of 12 V. The current intensity in the circuit is 2 A.

What is the resistance in the circuit?

7 –  Watch the video on “Types of Electrical Circuits” and answer:

• a)  What is a “series circuit”? What is its problem?
• b)  What is a “parallel circuit”? What happens if we remove one light?

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8 –  Fill the crossword with words about electrical circuits.