Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 260 · 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.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
3. 3.⚡ What does an electric iron mainly change electricity into? (a) sound (b) heat (c) light (d) movement
4. 4.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a complete loop (d) a broken path
5. 5.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) the same voltage (d) a smaller voltage
6. 6.True or false: to build with an adult near is safe. (a) True (b) False
7. 7.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
8. 8.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
9. 9.Which of these is true of a series circuit? (a) a break stops every bulb (b) each gets the full volts (c) used in house wiring (d) one out, the rest glow
10. 10.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
12. 12.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
13. 13.⚡ What does a torch mainly change electricity into? (a) sound (b) heat (c) movement (d) light
14. 14.⚡ What does a tube light mainly change electricity into? (a) movement (b) sound (c) light (d) heat
15. 15.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
16. 16.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
17. 17.Which of these gives us electricity? (a) an air conditioner (b) a water pump (c) a refrigerator (d) a generator
18. 18.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
20. 20.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) an inverter socket (c) a small battery pack (d) a wall socket
21. 21.Which of these is true of a parallel circuit? (a) a single current path (b) one out, the rest glow (c) bulbs share the voltage (d) one bulb out, all go out
22. 22.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
23. 23.True or false: a safety pin is a conductor. (a) False (b) True
24. 24.Which of these is safe? (a) use a cable with cuts (b) fly a kite near wires (c) use mains for a project (d) dry your hands first
25. 25.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
26. 26.🔋 6 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
27. 27.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
28. 28.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) bulb (b) cell (c) motor (d) junction
29. 29.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
30. 30.🔍 Which is the odd one out? (a) fly kites in open fields (b) stay away from pylons (c) poke things in a socket (d) take cells out after use
31. 31.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) wait and watch (c) shout for an adult (d) pull them by the hand
32. 32.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
33. 33.🔌 Most metals are good … (a) magnets only (b) insulators (c) conductors (d) batteries
34. 34.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
35. 35.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
36. 36.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
37. 37.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are OFF (c) when both are ON (d) never
38. 38.🔋 A 3 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.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No

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