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 NAMEMAGNITUDE SYMBOLUNIT NAMEUNIT SYMBOL
Current (the flow of electrons)VohmA
Tension (the force that pushes the electrons)RampV
ResistanceIvoltΩ

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

Current Intensity (I) Tension (also called Voltage) (V)Resistance (R)
 a)?12 V4 Ω
 b)4 A?5 Ω
 c)2 A36 V?
 d) ?8 V   8 Ω
 e) 1.5 A10 Ω
 f) 4.6 A9.2 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.