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

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?

2 –  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

3 –  Look at the table 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 

4 –  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?

5 –  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?