Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 736 · 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) stop if a part gets hot (b) poke things in a socket (c) climb an electric pole (d) use mains for a project
2. 2.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
3. 3.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) the longer line (d) neither line
5. 5.Which of these means the circuit is open? (a) the bulb is unscrewed (b) all wires are joined (c) the loop is complete (d) the switch is ON
6. 6.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
7. 7.Which of these is safe? (a) throw cells in a fire (b) open a phone charger (c) use small battery cells (d) touch a fallen wire
8. 8.True or false: a paper strip is an insulator. (a) True (b) False
9. 9.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
10. 10.True or false: to poke things in a socket is safe. (a) False (b) True
11. 11.Which of these is an insulator? (a) a copper wire (b) aluminium foil (c) a paper strip (d) a steel spoon
12. 12.True or false: to use small battery cells is not safe. (a) False (b) True
13. 13.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
14. 14.Which of these is true of a parallel circuit? (a) a single current path (b) many paths for current (c) a break stops every bulb (d) one bulb out, all go out
15. 15.🔦 A circuit has a new 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
16. 16.Which of these is not safe? (a) throw cells in a fire (b) dry your hands first (c) stop if a part gets hot (d) use small battery cells
17. 17.True or false: a buzzer mainly makes sound. (a) True (b) False
18. 18.What does a slide switch do? (a) stays where you flip it (b) flips up or down (c) slides side to side (d) closes when tipped over
19. 19.🔍 Which is the odd one out? (a) a ceiling fan (b) an electric drill (c) an electric toy car (d) an LED lamp
20. 20.🔋 4 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
22. 22.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) a kind of bulb (d) two or more cells joined
23. 23.🔍 Which is the odd one out? (a) fly a kite near wires (b) build with an adult near (c) use a cable with cuts (d) throw cells in a fire
24. 24.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
25. 25.True or false: a small empty box is the symbol for a junction. (a) True (b) False
26. 26.Which drawing is the symbol for a diode? (a) a circle with M inside (b) a circle with an X in it (c) a long and a short line (d) triangle against a bar
27. 27.True or false: a long and a short line is the symbol for a switch. (a) False (b) True
28. 28.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) straight lines (d) wavy lines
29. 29.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
30. 30.🔌 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
31. 31.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) one loose end (d) a plastic gap
32. 32.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
33. 33.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) use a cable with cuts (b) poke things in a socket (c) touch a switch when wet (d) take cells out after use
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) Yes (b) No
36. 36.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) by Wi-Fi (d) in parallel
37. 37.🔋 How many 1.2 V cells must be joined in series to give 6 V?
38. 38.True or false: a push button works only while pressed. (a) False (b) True
39. 39.🔋 2 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)? =
40. 40.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids