Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 217 · 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: a doorbell mainly gives out light. (a) True (b) False
2. 2.Which of these is a conductor? (a) a steel spoon (b) a dry cork (c) a rubber eraser (d) a paper strip
3. 3.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
5. 5.Which of these uses electricity? (a) a television (b) a battery (c) a solar panel (d) a power station
6. 6.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
7. 7.🔍 Which is the odd one out? (a) a copper wire (b) a safety pin (c) a cotton thread (d) a steel coin
8. 8.🔘 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) No (b) Yes
9. 9.🔦 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 ceramic cup. Does the bulb glow? (a) No (b) Yes
10. 10.True or false: to dry your hands first is not safe. (a) True (b) False
11. 11.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) the bulb is unscrewed
13. 13.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
14. 14.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
15. 15.Which of these is true of a parallel circuit? (a) many paths for current (b) a break stops every bulb (c) bulbs share the voltage (d) a single current path
16. 16.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) bulb (b) resistor (c) cell (d) LED
17. 17.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
18. 18.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) copper (d) glass
19. 19.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a plug top (d) a bulb
20. 20.💡 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?
21. 21.Which of these is not safe? (a) use small battery cells (b) stop if a part gets hot (c) use mains for a project (d) dry your hands first
22. 22.🔦 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) No (b) Yes
23. 23.Which of these means the circuit is open? (a) all wires are joined (b) a wire has come loose (c) the loop is complete (d) the switch is ON
24. 24.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
25. 25.🔘 Which kind of switch flips up or down? (a) a tilt switch (b) a push button (c) a slide switch (d) a toggle switch
26. 26.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
27. 27.Which of these is safe? (a) use small battery cells (b) poke things in a socket (c) use mains for a project (d) open a phone charger
28. 28.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
29. 29.True or false: to open a phone charger is not safe. (a) True (b) False
30. 30.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
31. 31.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a rubber band. Does the bulb glow? (a) Yes (b) No
33. 33.True or false: a circle with a cross is the symbol for a cell. (a) False (b) True
34. 34.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
35. 35.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) cell (b) LED (c) wire (d) resistor
36. 36.True or false: an electric toy car mainly gives out light. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) touch a switch when wet (b) take cells out after use (c) throw cells in a fire (d) use a cable with cuts
38. 38.True or false: a line lifted at a gap is the symbol for a battery. (a) False (b) True
39. 39.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
40. 40.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False

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