Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 676 · 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.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
2. 2.Which of these is safe? (a) use a cable with cuts (b) use mains for a project (c) fly a kite near wires (d) stay away from pylons
3. 3.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) heat (c) sound (d) light
4. 4.🔋 6 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)? =
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) Yes (b) No
6. 6.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a toggle switch (c) a reed switch (d) a tilt switch
7. 7.Which of these is an insulator? (a) a woollen thread (b) a metal paper clip (c) a copper wire (d) a steel coin
8. 8.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
9. 9.Which of these is true of a parallel circuit? (a) many paths for current (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
10. 10.True or false: a rice cooker mainly gives out heat. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) a torch (b) a tube light (c) an electric toy car (d) an LED lamp
12. 12.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) a rice cooker (b) an electric toy car (c) a mixer grinder (d) a table fan
14. 14.Which drawing is the symbol for a diode? (a) a circle with an X in it (b) a long and a short line (c) triangle against a bar (d) a circle with A inside
15. 15.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
16. 16.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
17. 17.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
18. 18.True or false: a ceiling fan mainly gives out heat. (a) False (b) True
19. 19.⚡ What does an LED lamp mainly change electricity into? (a) movement (b) light (c) sound (d) heat
20. 20.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
21. 21.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water makes it cold (c) water carries current (d) it is just untidy
22. 22.💡 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) brighter (c) the same
23. 23.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
24. 24.What does a slide switch do? (a) flips up or down (b) springs back when let go (c) works only while pressed (d) slides side to side
25. 25.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) bury them in soil (d) throw them in a fire
26. 26.Which of these mainly gives out heat? (a) a school bell (b) a buzzer (c) a loudspeaker (d) a toaster
27. 27.Which drawing is the symbol for an LED? (a) one tall, one short bar (b) triangle, bar and arrows (c) a circle with M inside (d) a straight line
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) No (b) Yes
29. 29.Which of these is not safe? (a) keep drinks far away (b) take cells out after use (c) use a cable with cuts (d) use small battery cells
30. 30.🔘 What does a switch do in a circuit? (a) makes electricity (b) changes the voltage (c) opens or closes the loop (d) stores current
31. 31.🔍 Which is the odd one out? (a) build with an adult near (b) keep drinks far away (c) climb an electric pole (d) stay away from pylons
32. 32.🔍 Which is the odd one out? (a) build with an adult near (b) stay away from pylons (c) use mains for a project (d) use small battery cells
33. 33.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
34. 34.Which of these is safe? (a) use mains for a project (b) open a phone charger (c) keep drinks far away (d) fly a kite near wires
35. 35.🔍 Which is the odd one out? (a) touch a switch when wet (b) use small battery cells (c) throw cells in a fire (d) climb an electric pole
36. 36.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
37. 37.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
38. 38.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
39. 39.True or false: a tilt switch springs back when let go. (a) True (b) False
40. 40.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe

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