Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 512 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
2. 2.True or false: to build with an adult near is not safe. (a) False (b) True
3. 3.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
5. 5.What does a push button do? (a) springs back when let go (b) slides side to side (c) closes when tipped over (d) flips up or down
6. 6.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
7. 7.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
8. 8.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
9. 9.Which drawing is the symbol for an LED? (a) two equal parallel lines (b) triangle, bar and arrows (c) a circle with a cross (d) a long and a short line
10. 10.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
11. 11.Which of these is true of a parallel circuit? (a) used in house wiring (b) a break stops every bulb (c) bulbs share the voltage (d) one bulb out, all go out
12. 12.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a long wire (c) a fuse or MCB (d) a plug top
13. 13.🔍 Which is the odd one out? (a) touch a fallen wire (b) climb an electric pole (c) open a phone charger (d) stop if a part gets hot
14. 14.True or false: to touch a fallen wire is not safe. (a) False (b) True
15. 15.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
16. 16.🔍 Which is the odd one out? (a) take cells out after use (b) stay away from pylons (c) build with an adult near (d) poke things in a socket
17. 17.Which of these is true of a series circuit? (a) own switch for each bulb (b) each gets the full volts (c) a break stops every bulb (d) one out, the rest glow
18. 18.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
19. 19.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when both are ON (c) when either is ON (d) never
20. 20.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
21. 21.🔘 A bulb and a cell are joined through 3 switches on 3 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
22. 22.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) No (b) Yes
25. 25.Which of these is true of a series circuit? (a) a single current path (b) one out, the rest glow (c) each gets the full volts (d) used in house wiring
26. 26.Which of these uses electricity? (a) a bicycle dynamo (b) a battery (c) a solar panel (d) a computer
27. 27.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
28. 28.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a stranger online (c) a younger child (d) nobody
29. 29.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
30. 30.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
31. 31.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
32. 32.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
33. 33.What does a reed switch do? (a) closes near a magnet (b) stays where you flip it (c) slides side to side (d) works only while pressed
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
35. 35.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
36. 36.🔍 Which is the odd one out? (a) a paper strip (b) a plastic ruler (c) a brass key (d) a cotton thread
37. 37.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
38. 38.🔍 Which is the odd one out? (a) stay away from pylons (b) use mains for a project (c) take cells out after use (d) keep drinks far away
39. 39.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
40. 40.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) the switch is OFF

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