Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 127 · 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: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
2. 2.Which of these means the circuit is open? (a) a wire is cut (b) the loop is complete (c) the switch is ON (d) all wires are joined
3. 3.🔍 Which is the odd one out? (a) an electric toy car (b) a rice cooker (c) a toaster (d) an electric iron
4. 4.💡 3 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?
5. 5.🔍 Which is the odd one out? (a) fly a kite near wires (b) poke things in a socket (c) touch a switch when wet (d) keep drinks far away
6. 6.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
7. 7.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
8. 8.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
9. 9.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
10. 10.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.True or false: to keep drinks far away is safe. (a) False (b) True
12. 12.⚡ What does a night lamp mainly change electricity into? (a) heat (b) sound (c) movement (d) light
13. 13.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
14. 14.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
15. 15.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
16. 16.What does a slide switch do? (a) closes when tipped over (b) closes near a magnet (c) slides side to side (d) springs back when let go
17. 17.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.True or false: to touch a switch when wet is safe. (a) False (b) True
19. 19.True or false: a reed switch closes near a magnet. (a) True (b) False
20. 20.🔦 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 safety pin. Does the bulb glow? (a) Yes (b) No
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
22. 22.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) resistor (b) capacitor (c) wire (d) motor
23. 23.🔋 How many 2 V cells must be joined in series to give 8 V?
24. 24.Which of these gives us electricity? (a) a water pump (b) a washing machine (c) a wind turbine (d) a computer
25. 25.🔋 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)? =
26. 26.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
27. 27.What does a tilt switch do? (a) springs back when let go (b) closes near a magnet (c) works only while pressed (d) closes when tipped over
28. 28.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when either is ON (c) when both are ON (d) never
29. 29.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) light energy (d) movement energy
30. 30.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
31. 31.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
32. 32.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
33. 33.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
34. 34.True or false: an electric iron mainly makes movement. (a) True (b) False
35. 35.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) No (b) Yes
36. 36.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
37. 37.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
38. 38.💡 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
39. 39.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
40. 40.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False

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