Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 450 · 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.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
2. 2.⚡ What does a mixer grinder mainly change electricity into? (a) heat (b) sound (c) movement (d) light
3. 3.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a cell is taken out (c) a wire has come loose (d) the switch is ON
4. 4.True or false: a ceiling fan mainly gives out light. (a) True (b) False
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) No (b) Yes
6. 6.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a complete loop (d) a plastic gap
7. 7.True or false: triangle, bar and arrows is the symbol for an LED. (a) False (b) True
8. 8.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a trusted adult (c) a stranger online (d) a younger child
9. 9.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
10. 10.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
11. 11.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
12. 12.🔍 Which is the odd one out? (a) a torch (b) a tube light (c) a doorbell (d) an LED lamp
13. 13.🔍 Which is the odd one out? (a) use mains for a project (b) poke things in a socket (c) stay away from pylons (d) throw cells in a fire
14. 14.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the steel shaft (c) the metal tip (d) the bare end
15. 15.💡 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?
16. 16.True or false: a toggle switch flips up or down. (a) True (b) False
17. 17.Which of these is a conductor? (a) a dry cork (b) a woollen thread (c) a plastic ruler (d) a safety pin
18. 18.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
19. 19.Which of these is a conductor? (a) a ceramic cup (b) a woollen thread (c) a brass key (d) a wooden stick
20. 20.True or false: a circle with M inside is the symbol for a cell. (a) True (b) False
21. 21.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) a small empty box (c) a long and a short line (d) a circle with V inside
22. 22.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
23. 23.🔘 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) No (b) Yes
24. 24.🔍 Which is the odd one out? (a) a loudspeaker (b) an electric drill (c) a mixer grinder (d) an exhaust fan
25. 25.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
26. 26.Which of these mainly gives out light? (a) a street light (b) a doorbell (c) an electric toy car (d) an electric kettle
27. 27.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
28. 28.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) Yes (b) No
29. 29.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a reed switch (c) a slide switch (d) a toggle switch
30. 30.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) a circle with a cross (c) a plain rectangle (d) two or more cell symbols
31. 31.🔍 Which is the odd one out? (a) keep drinks far away (b) use a cable with cuts (c) use mains for a project (d) open a phone charger
32. 32.🔍 Which is the odd one out? (a) climb an electric pole (b) fly a kite near wires (c) build with an adult near (d) touch a fallen wire
33. 33.🔦 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
34. 34.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
35. 35.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
36. 36.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
37. 37.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
38. 38.Which of these gives us electricity? (a) a washing machine (b) an air conditioner (c) a bicycle dynamo (d) a refrigerator
39. 39.True or false: a circle with V inside is the symbol for a switch. (a) True (b) False
40. 40.True or false: a reed switch closes near a magnet. (a) False (b) True

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