Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 155 · 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.🔍 Which is the odd one out? (a) aluminium foil (b) a safety pin (c) a metal paper clip (d) a wooden stick
2. 2.🔍 Which is the odd one out? (a) use mains for a project (b) open a phone charger (c) take cells out after use (d) touch a switch when wet
3. 3.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
4. 4.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
5. 5.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) a bigger voltage (d) the same voltage
6. 6.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) two (d) one
7. 7.🔋 5 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
8. 8.Which of these gives us electricity? (a) a bicycle dynamo (b) a washing machine (c) a water pump (d) a computer
9. 9.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) No (b) Yes
10. 10.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) closed (d) cut
11. 11.True or false: a rubber band is a conductor. (a) False (b) True
12. 12.Which of these is a conductor? (a) a glass marble (b) a graphite rod (c) a cotton thread (d) a dry cork
13. 13.Which of these is true of a parallel circuit? (a) one out, the rest glow (b) a break stops every bulb (c) bulbs share the voltage (d) a single current path
14. 14.Which of these gives us electricity? (a) a computer (b) a refrigerator (c) a television (d) a cell
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 ON and B is ON. Does the bulb glow? (a) Yes (b) No
16. 16.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.Which of these mainly gives out light? (a) a room heater (b) a night lamp (c) a table fan (d) a toaster
18. 18.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.True or false: a toggle switch stays where you flip it. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) aluminium foil (b) a rubber eraser (c) a copper wire (d) a steel coin
21. 21.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) to save copper only (d) each gets full voltage
22. 22.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one bulb out, all go out (d) each gets the full volts
23. 23.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
24. 24.Which of these is an insulator? (a) a brass key (b) a copper wire (c) a glass marble (d) a steel spoon
25. 25.🔍 Which is the odd one out? (a) use a cable with cuts (b) poke things in a socket (c) build with an adult near (d) use mains for a project
26. 26.True or false: a reed switch closes when tipped over. (a) False (b) True
27. 27.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
28. 28.🔦 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
29. 29.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.🔋 3 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)? =
31. 31.🔍 Which is the odd one out? (a) touch a fallen wire (b) dry your hands first (c) use mains for a project (d) throw cells in a fire
32. 32.🔍 Which is the odd one out? (a) use mains for a project (b) fly kites in open fields (c) throw cells in a fire (d) touch a fallen wire
33. 33.Which drawing is the symbol for a switch? (a) two equal parallel lines (b) two or more cell symbols (c) a line lifted at a gap (d) triangle, bar and arrows
34. 34.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
35. 35.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) two or more cells joined (d) one single wire
36. 36.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
37. 37.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
38. 38.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) an open circuit (d) a series circuit
39. 39.💡 6 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. How many bulbs glow?
40. 40.Which of these is safe? (a) throw cells in a fire (b) fly a kite near wires (c) build with an adult near (d) use mains for a project

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