You may write on
this sheet
Name: __________________________ Tutor group: ____________
For questions 1 to 9 chose the correct word from each set of brackets to make each
sentence correct and underline it.
1. To make an electric device work you need a (plastic/cell/complete/incomplete)
circuit.
2. Wires have metal in them because they (generate/resist/produce/conduct)
electricity
3. An electric bulb gives out (light/sound/chemical/nuclear) energy and heat energy.
4. The flow of electricity through a wire is called (current/electron/voltage/power).
5. A small wire that melts if the current gets too big is called a
(filament/fuse/fail).
6. Electric current is measured in (Amps/volts/ohms/seconds)
7. Electric current is measured in (Amps/volts/ohms/seconds)
8. A longer wire will be more difficult for electrons to flow through. We say that
the longer wire has a bigger (resistor/resistance/resist/refraction)
9. The more bulbs that you put in series in a circuit, the (brighter/dimmer/hotter)
they become. This is because there is more (resistor/resistance/resist/refraction)
in the circuit.
Look at diagrams A to D to answer questions 9 to 13.
10. In which of the circuits above are the bulbs brightest? A, B, C or D? ____
11. What type of circuit is A? ____________________
12. What type of circuit is C? ______________________________
13. What is wrong with circuit B if it is meant to light up the two bulbs?
________________________________________________________
____________________________________
Look at the circuit opposite. Decide which
of the switches A to E correctly answer A
questions 14 to 17 B
14. Which switch controls all the bulbs? ____
15. Which switch controls only bulb 1? ____ E
C
16. Which switch controls only bulb 3? ____
17. Which switch controls bulbs 2 and 3 but
not bulb 1? _____ D
Look at the diagram below before answering questions 18 to 19.
18. If the wire was replaced with
50 cm of the same wire, what would
happen to the brightness of the bulb?
___________________________
100cm of
19. If the original wire was replaced
thin copper
with thicker wire of the same material and wire
same length, what would happen to the
brightness of the bulb?
____________________________
20. Draw a circuit to show: two cells, a switch and two lamps all connected in
series.
21. If one lamp 'blows' in the circuit you have drawn what will happen to the
other lamp? ______________________________________________
22. Explain your answer to question 21 _________________________
__________________________________________________________
23. If you connect another lamp in the series circuit, what happens to the
brightness of all the lamps? ______________________________________
24. Explain your answer to question 23 ___________________________
___________________________________________________________
__________________________________________________________
25. Draw a circuit to show: two cells, a switch and two lamps. Show the lamps
connected in parallel.
26. If one lamp 'blows' what will happen to the other lamp in the parallel circuit?
______________________________________________________________
27. Explain your answer to question 26 ____________________________
__________________________________________________________
__________________________________________________________
Explaining electricity can be helped by imagining water flowing around pipes. For
questions 28 to 30 match up which of the electrical devices in the left hand list is
like which object on the right hand list. (Write the letter)
28. The thin filament A: A clamp that squeezes the hose pipe
wire inside a bulb
______
29. The battery ___ B: A part of a hose pipe that is much
thinner than the rest of the hose pipe.
C: A water pump that makes the water flow
30. A switch _____ through a hose.
Now go back and check your work to make sure you haven’t made any silly mistakes.
