eurekami

Brighter or dimmer? Changing cells and bulbs

5th grade (Year 6 in England) · 16 questions · Common Core: NGSS.4-PS3-2 · England: KS2 Y6 Electricity

Name

Date

Score/ 16

1
Question 1
A series circuit has 1 cell and 1 bulb. It is changed to 2 cells and 2 bulbs (all the same type). How bright is each bulb now?
- A. brighter than before
- B. the same as before
- C. dimmer than before
2
Question 2
True or false? Circuit diagrams use standard symbols.
- A. True
- B. False
3
Question 3
Two cells are used instead of one, but they are put in facing opposite ways. What happens to the bulb?
- A. It is twice as bright.
- B. It explodes.
- C. It does not light, because the cells push against each other.
- D. It changes colour.
4
Question 4
A series circuit has 3 cells and 2 bulbs. It is changed to 4 cells and 2 bulbs (all the same type). How bright is each bulb now?
- A. brighter than before
- B. the same as before
- C. dimmer than before
5
Question 5
True or false? Circuit diagrams use standard symbols.
- A. True
- B. False
6
Question 6
Why might a bulb blow if you add too many cells?
- A. Bulbs only work with one cell.
- B. The wires disappear.
- C. Too much current makes the filament overheat and break.
- D. The cells get cold.
7
Question 7
A series circuit has 3 cells and 1 bulb. It is changed to 4 cells and 1 bulb (all the same type). How bright is each bulb now?
- A. brighter than before
- B. the same as before
- C. dimmer than before
8
Question 8
True or false? Adding cells to a series circuit makes the bulbs brighter.
- A. True
- B. False
9
Question 9
A buzzer is too quiet. What change to the circuit will make it louder?
- A. Add another cell.
- B. Use longer wires.
- C. Open the switch.
- D. Add another buzzer.
10
Question 10
A series circuit has 3 cells and 2 bulbs. It is changed to 2 cells and 2 bulbs (all the same type). How bright is each bulb now?
- A. brighter than before
- B. the same as before
- C. dimmer than before
11
Question 11
True or false? Adding cells to a series circuit makes the bulbs brighter.
- A. True
- B. False
12
Question 12
A buzzer is too quiet. What change to the circuit will make it louder?
- A. Use longer wires.
- B. Add another buzzer.
- C. Add another cell.
- D. Open the switch.
13
Question 13
A series circuit has 2 cells and 2 bulbs. It is changed to 3 cells and 3 bulbs (all the same type). How bright is each bulb now?
- A. brighter than before
- B. the same as before
- C. dimmer than before
14
Question 14
True or false? Adding bulbs to a series circuit makes each bulb dimmer.
- A. True
- B. False
15
Question 15
A buzzer is too quiet. What change to the circuit will make it louder?
- A. Open the switch.
- B. Add another buzzer.
- C. Add another cell.
- D. Use longer wires.
16
Question 16
A series circuit has 1 cell and 2 bulbs. It is changed to 2 cells and 4 bulbs (all the same type). How bright is each bulb now?
- A. brighter than before
- B. the same as before
- C. dimmer than before

All done? Color in the animal! · Free from eurekami.com/math

for the adult only

Answer key: Brighter or dimmer? Changing cells and bulbs

1. B. the same as before
2. A. True
3. C. It does not light, because the cells push against each other.
4. A. brighter than before
5. A. True
6. C. Too much current makes the filament overheat and break.
7. A. brighter than before
8. A. True
9. A. Add another cell.
10. C. dimmer than before
11. A. True
12. C. Add another cell.
13. B. the same as before
14. A. True
15. C. Add another cell.
16. B. the same as before