Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 870 · 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 metal is used for most electric wires at home? (a) glass (b) copper (c) plastic (d) rubber
2. 2.True or false: a push button springs back when let go. (a) False (b) True
3. 3.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
4. 4.True or false: a buzzer mainly gives out light. (a) False (b) True
5. 5.Which of these is not safe? (a) take cells out after use (b) build with an adult near (c) throw cells in a fire (d) keep drinks far away
6. 6.True or false: “a single current path” is true of a series circuit. (a) True (b) False
7. 7.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
8. 8.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
9. 9.True or false: two equal parallel lines is the symbol for a bulb. (a) True (b) False
10. 10.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
12. 12.Which of these mainly gives out heat? (a) a mixer grinder (b) a doorbell (c) a room heater (d) an electric drill
13. 13.True or false: a safety pin is a conductor. (a) False (b) True
14. 14.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
15. 15.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
16. 16.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
17. 17.🔘 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
18. 18.🔦 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) No (b) Yes
19. 19.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
20. 20.⚡ What does a street light mainly change electricity into? (a) movement (b) light (c) heat (d) sound
21. 21.True or false: a copper wire is a conductor. (a) False (b) True
22. 22.Which drawing is the symbol for a diode? (a) a long and a short line (b) one tall, one short bar (c) triangle against a bar (d) a line lifted at a gap
23. 23.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
24. 24.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
25. 25.Which of these mainly gives out light? (a) an electric toy car (b) an exhaust fan (c) a street light (d) an electric kettle
26. 26.True or false: a line lifted at a gap is the symbol for a cell. (a) True (b) False
27. 27.Which of these mainly makes movement? (a) a room heater (b) an electric drill (c) a tube light (d) a night lamp
28. 28.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
29. 29.🔋 7 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
30. 30.🔍 Which is the odd one out? (a) touch a switch when wet (b) use mains for a project (c) use a cable with cuts (d) dry your hands first
31. 31.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire has come loose
32. 32.Which of these mainly makes sound? (a) a room heater (b) a school bell (c) an electric kettle (d) a mixer grinder
33. 33.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
34. 34.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
35. 35.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) so all go off together (d) to make bulbs dim
37. 37.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
38. 38.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) to make it colourful (d) quick and clear for all
39. 39.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
40. 40.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)

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