Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 861 · 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.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) nobody (c) a trusted adult (d) a stranger online
2. 2.🔍 Which is the odd one out? (a) use a cable with cuts (b) fly kites in open fields (c) stop if a part gets hot (d) dry your hands first
3. 3.🔍 Which is the odd one out? (a) a wooden stick (b) a steel spoon (c) a rubber eraser (d) a cotton thread
4. 4.💡 2 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 1 glow? (a) Yes (b) No
5. 5.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.🔍 Which is the odd one out? (a) touch a switch when wet (b) climb an electric pole (c) open a phone charger (d) dry your hands first
7. 7.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
8. 8.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) the switch is OFF (d) all wires are joined
9. 9.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
10. 10.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
11. 11.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) when either is ON (c) never (d) only when both are OFF
12. 12.🔍 Which is the odd one out? (a) poke things in a socket (b) keep drinks far away (c) take cells out after use (d) build with an adult near
13. 13.🔌 Is a brass key a conductor or an insulator? (a) a conductor (b) an insulator
14. 14.True or false: “a single current path” is true of a series circuit. (a) False (b) True
15. 15.True or false: to touch a fallen wire is safe. (a) False (b) True
16. 16.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
17. 17.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
18. 18.Which drawing is the symbol for a battery? (a) a circle with an X in it (b) triangle against a bar (c) a dot where wires meet (d) many long-short pairs
19. 19.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
20. 20.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
21. 21.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
22. 22.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
23. 23.Which of these is a conductor? (a) a dry cork (b) a ceramic cup (c) an iron nail (d) a wooden stick
24. 24.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 15 V (d) 230 V
25. 25.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) broken (d) cut
26. 26.Which drawing is the symbol for a cell? (a) a circle with a cross (b) two equal parallel lines (c) one tall, one short bar (d) a circle with A inside
27. 27.Which of these mainly makes movement? (a) a night lamp (b) a torch (c) a table fan (d) a room heater
28. 28.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a series circuit (c) a closed circuit (d) an open circuit
29. 29.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
30. 30.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) one out, the rest glow (d) a single current path
31. 31.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
32. 32.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
33. 33.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
34. 34.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
35. 35.🔍 Which is the odd one out? (a) a woollen thread (b) a glass marble (c) a paper strip (d) a copper wire
36. 36.True or false: a night lamp mainly gives out light. (a) False (b) True
37. 37.True or false: to open a phone charger is not safe. (a) False (b) True
38. 38.Which of these is safe? (a) touch a fallen wire (b) use mains for a project (c) keep drinks far away (d) poke things in a socket
39. 39.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
40. 40.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) throw them in a fire (d) cut them open

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