Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 307 · 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.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
2. 2.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
3. 3.🔍 Which is the odd one out? (a) a mixer grinder (b) a rice cooker (c) an electric kettle (d) a water heater
4. 4.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
5. 5.Which of these means the circuit is open? (a) a wire is cut (b) the loop is complete (c) all wires are joined (d) the switch is ON
6. 6.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) bulb (c) cell (d) voltmeter
7. 7.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) one single wire (d) a kind of bulb
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
9. 9.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
10. 10.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
11. 11.True or false: to build with an adult near is not safe. (a) True (b) False
12. 12.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) when either is ON (d) only when both are OFF
13. 13.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) cell (b) LED (c) switch (d) voltmeter
14. 14.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a bulb (d) a plug top
15. 15.🔍 Which is the odd one out? (a) a traffic signal (b) a street light (c) a torch (d) an exhaust fan
16. 16.Which of these is a conductor? (a) a plastic straw (b) aluminium foil (c) a paper strip (d) a rubber eraser
17. 17.Which of these means the circuit is open? (a) all wires are joined (b) a wire has come loose (c) the switch is ON (d) the loop is complete
18. 18.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when both are ON (d) when either is ON
19. 19.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
20. 20.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
21. 21.What does a tilt switch do? (a) closes when tipped over (b) springs back when let go (c) stays where you flip it (d) slides side to side
22. 22.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
23. 23.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the bare end (c) the steel shaft (d) the metal tip
24. 24.True or false: a street light mainly gives out light. (a) False (b) True
25. 25.True or false: a toggle switch closes when tipped over. (a) True (b) False
26. 26.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
28. 28.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
29. 29.Which of these is an insulator? (a) a safety pin (b) a steel spoon (c) a rubber band (d) a brass key
30. 30.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
31. 31.Which of these is a conductor? (a) a cotton thread (b) a plastic straw (c) a glass marble (d) a brass key
32. 32.🔦 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) No (b) Yes
33. 33.Which of these uses electricity? (a) a bicycle dynamo (b) a generator (c) a computer (d) a battery
34. 34.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
35. 35.Which of these is safe? (a) poke things in a socket (b) throw cells in a fire (c) stay away from pylons (d) use a cable with cuts
36. 36.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) junction (b) motor (c) diode (d) wire
37. 37.🔍 Which is the odd one out? (a) take cells out after use (b) poke things in a socket (c) climb an electric pole (d) fly a kite near wires
38. 38.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
39. 39.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
40. 40.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) a smaller voltage (d) the same voltage

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