Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 129 · 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 toggle switch do? (a) closes near a magnet (b) stays where you flip it (c) springs back when let go (d) slides side to side
2. 2.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
3. 3.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
4. 4.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) resistor (b) motor (c) diode (d) battery
5. 5.🔋 How many 3 V cells must be joined in series to give 21 V?
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
7. 7.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
8. 8.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
9. 9.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
10. 10.True or false: a toggle switch flips up or down. (a) True (b) False
11. 11.🔋 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)? =
12. 12.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
13. 13.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
14. 14.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
15. 15.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
16. 16.True or false: to use small battery cells is not safe. (a) True (b) False
17. 17.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to save copper only (d) to make bulbs dim
18. 18.True or false: two equal parallel lines is the symbol for a switch. (a) True (b) False
19. 19.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
20. 20.🔦 A circuit has a used-up (dead) 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 steel spoon. Does the bulb glow? (a) No (b) Yes
21. 21.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) used in house wiring (d) bulbs share the voltage
22. 22.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
23. 23.Which of these is a conductor? (a) a rubber band (b) a glass marble (c) a graphite rod (d) a rubber eraser
24. 24.Which of these uses electricity? (a) a wind turbine (b) a generator (c) a water pump (d) a solar panel
25. 25.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) water makes it cold (d) it spoils the paint
26. 26.💡 5 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 2 glow? (a) No (b) Yes
27. 27.What does a tilt switch do? (a) stays where you flip it (b) slides side to side (c) closes when tipped over (d) springs back when let go
28. 28.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the bare end (d) the steel shaft
29. 29.Which drawing is the symbol for a motor? (a) a dot where wires meet (b) a circle with V inside (c) two or more cell symbols (d) a circle with M inside
30. 30.Which of these is not safe? (a) fly kites in open fields (b) use mains for a project (c) build with an adult near (d) take cells out after use
31. 31.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.🔦 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) No (b) Yes
33. 33.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) used in house wiring (d) own switch for each bulb
34. 34.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a single current path (d) one out, the rest glow
35. 35.🔍 Which is the odd one out? (a) an electric kettle (b) a water heater (c) a toaster (d) a school bell
36. 36.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a plug top (d) a fuse or MCB
37. 37.Which of these is not safe? (a) build with an adult near (b) stop if a part gets hot (c) take cells out after use (d) open a phone charger
38. 38.Which of these means the circuit is closed? (a) the switch is ON (b) a wire is cut (c) the switch is OFF (d) the bulb is unscrewed
39. 39.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to hide the circuit (c) symbols are heavier (d) to make it colourful
40. 40.True or false: a push button flips up or down. (a) False (b) True

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