Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 449 · 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.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
2. 2.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
3. 3.🔁 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
4. 4.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
5. 5.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) each gets the full volts (c) bulbs share the voltage (d) a single current path
6. 6.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
7. 7.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
8. 8.True or false: to use mains for a project is not safe. (a) True (b) False
9. 9.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
10. 10.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) wire (c) voltmeter (d) LED
12. 12.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
13. 13.🔌 Most metals are good … (a) conductors (b) magnets only (c) batteries (d) insulators
14. 14.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
15. 15.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
16. 16.Which of these is not safe? (a) take cells out after use (b) stop if a part gets hot (c) use a cable with cuts (d) stay away from pylons
17. 17.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
18. 18.🔦 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 cotton thread. Does the bulb glow? (a) Yes (b) No
19. 19.🔍 Which is the odd one out? (a) use small battery cells (b) stay away from pylons (c) use mains for a project (d) dry your hands first
20. 20.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a safe circuit (c) a parallel circuit (d) a short circuit
21. 21.🔦 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) Yes (b) No
22. 22.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
23. 23.🔍 Which is the odd one out? (a) a glass marble (b) a graphite rod (c) a plastic straw (d) a plastic ruler
24. 24.True or false: to poke things in a socket is not safe. (a) True (b) False
25. 25.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
26. 26.Which of these uses electricity? (a) a bicycle dynamo (b) a battery (c) a computer (d) a solar panel
27. 27.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
28. 28.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) light (c) heat (d) movement
29. 29.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) bulb (b) motor (c) switch (d) diode
30. 30.Which of these is safe? (a) poke things in a socket (b) fly kites in open fields (c) climb an electric pole (d) use mains for a project
31. 31.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) by Wi-Fi (d) in parallel
32. 32.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
33. 33.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
34. 34.True or false: a tilt switch slides side to side. (a) True (b) False
35. 35.Which of these is safe? (a) climb an electric pole (b) throw cells in a fire (c) build with an adult near (d) open a phone charger
36. 36.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
37. 37.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
38. 38.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) light energy (c) movement energy (d) chemical energy
39. 39.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
40. 40.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) wire (b) bulb (c) cell (d) battery

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