Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 578 · 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.What does a slide switch do? (a) works only while pressed (b) flips up or down (c) slides side to side (d) closes when tipped over
2. 2.True or false: to stop if a part gets hot is safe. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) fly a kite near wires (b) poke things in a socket (c) use small battery cells (d) climb an electric pole
4. 4.Which of these mainly gives out light? (a) a toaster (b) a torch (c) an electric toy car (d) a school bell
5. 5.Which of these is safe? (a) use a cable with cuts (b) touch a switch when wet (c) stop if a part gets hot (d) touch a fallen wire
6. 6.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
7. 7.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
8. 8.🔋 8 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)? =
9. 9.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a brass key. Does the bulb glow? (a) Yes (b) No
10. 10.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) resistor (b) motor (c) ammeter (d) switch
11. 11.True or false: a push button stays where you flip it. (a) True (b) False
12. 12.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
13. 13.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
14. 14.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
15. 15.True or false: to use small battery cells is not safe. (a) False (b) True
16. 16.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
17. 17.🔍 Which is the odd one out? (a) use a cable with cuts (b) climb an electric pole (c) use mains for a project (d) build with an adult near
18. 18.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) many paths for current (d) one bulb out, all go out
19. 19.True or false: triangle, bar and arrows is the symbol for an LED. (a) True (b) False
20. 20.Which of these is a conductor? (a) a ceramic cup (b) a plastic straw (c) aluminium foil (d) a woollen thread
21. 21.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
22. 22.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a trusted adult (c) a younger child (d) a stranger online
23. 23.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) No (b) Yes
25. 25.Which of these is true of a parallel circuit? (a) used in house wiring (b) a break stops every bulb (c) one bulb out, all go out (d) a single current path
26. 26.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) junction (b) capacitor (c) battery (d) switch
27. 27.🔌 Most metals are good … (a) batteries (b) insulators (c) magnets only (d) conductors
28. 28.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
29. 29.True or false: a plastic straw is an insulator. (a) False (b) True
30. 30.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
31. 31.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the bulb is unscrewed (d) the switch is ON
32. 32.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
33. 33.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
34. 34.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
35. 35.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
36. 36.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a conductor (d) a cell
37. 37.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
38. 38.🔌 Is a metal paper clip a conductor or an insulator? (a) a conductor (b) an insulator
39. 39.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) resistor (b) capacitor (c) LED (d) battery
40. 40.Which drawing is the symbol for a cell? (a) a circle with M inside (b) one tall, one short bar (c) a dot where wires meet (d) a line lifted at a gap

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