Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 380 · 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.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
2. 2.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) two or more cells joined (d) a switch with a lid
3. 3.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
4. 4.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
5. 5.Which of these is safe? (a) fly a kite near wires (b) open a phone charger (c) throw cells in a fire (d) stay away from pylons
6. 6.🔦 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 safety pin. Does the bulb glow? (a) No (b) Yes
7. 7.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) a closed circuit (d) an open circuit
8. 8.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) an open circuit (d) a safe circuit
9. 9.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
10. 10.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
11. 11.💡 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
12. 12.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
13. 13.True or false: to stop if a part gets hot is not safe. (a) True (b) False
14. 14.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
15. 15.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the glass (c) the switch (d) the filament
16. 16.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
17. 17.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
18. 18.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) it does not matter (d) both of them
19. 19.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
20. 20.True or false: to dry your hands first is safe. (a) True (b) False
21. 21.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
22. 22.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
23. 23.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
24. 24.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
25. 25.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
26. 26.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
27. 27.Which drawing is the symbol for a bulb? (a) a long and a short line (b) a plain rectangle (c) a circle with a cross (d) a circle with V inside
28. 28.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
29. 29.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
30. 30.Which of these is a conductor? (a) a safety pin (b) a rubber band (c) a paper strip (d) a plastic ruler
31. 31.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) battery (b) junction (c) wire (d) resistor
33. 33.Which of these uses electricity? (a) a water pump (b) a bicycle dynamo (c) a solar panel (d) a cell
34. 34.💡 A battery lights 4 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
35. 35.What does a toggle switch do? (a) springs back when let go (b) closes when tipped over (c) flips up or down (d) slides side to side
36. 36.What does a tilt switch do? (a) closes when tipped over (b) stays where you flip it (c) flips up or down (d) closes near a magnet
37. 37.🔋 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)? =
38. 38.🔍 Which is the odd one out? (a) take cells out after use (b) touch a switch when wet (c) climb an electric pole (d) use mains for a project
39. 39.True or false: a circle with M inside is the symbol for an LED. (a) True (b) False
40. 40.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) diode (b) cell (c) battery (d) motor

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