Circuits

Look at these 4 circuit diagrams.

Q1-5. Which of these...
1. will not work?
2. has 2 working light bulbs in series?
3. has 2 working light bulbs in parallel?

4. is the one shown in this picture?  
5. will produce the most light?

6. Two cells can be put end to produce more voltage. Can you give the name of this and the correct way of connect the cells?

 Name connections
A
 battery cells end to end version A
B
 battery cells end to end version B
C
 power pack cells end to end version A
D
 power pack cells end to end version B

7. A student wants to add a switch to the circuit below to turn bulb X on/off but leave light bulb Y on. Where should it go?

 

8. Another student has tried to add the switch but has made this:

  

What will happen when the switch is closed?

  • A. Bulb X and Y turn on
  • B. Bulb X and Y turn off
  • C. Bulb X only will turn on
  • D. Bulb X only will turn off