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:
| MAGNITUDE NAME | MAGNITUDE SYMBOL | UNIT NAME | UNIT SYMBOL |
| Current (the flow of electrons) | V | ohm | A |
| Tension (the force that pushes the electrons) | R | amp | V |
| Resistance | I | volt | Ω |
4 – Use Ohm’s Law to calculate and fill in the gaps:
| Current Intensity (I) | Tension (also called Voltage) (V) | Resistance (R) | |
| a) | ? | 12 V | 4 Ω |
| b) | 4 A | ? | 5 Ω |
| c) | 2 A | 36 V | ? |
| d) | ? | 8 V | 8 Ω |
| e) | 1.5 A | ? | 10 Ω |
| f) | 4.6 A | 9.2 V | ? |
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.
