Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 462 · 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.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
3. 3.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
4. 4.🔋 How many 2 V cells must be joined in series to give 14 V?
5. 5.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
6. 6.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
7. 7.🔍 Which is the odd one out? (a) keep drinks far away (b) poke things in a socket (c) dry your hands first (d) use small battery cells
8. 8.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) switch (b) battery (c) resistor (d) bulb
9. 9.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) one bulb out, all go out (d) each gets the full volts
10. 10.Which of these mainly gives out heat? (a) a torch (b) an electric kettle (c) a doorbell (d) a night lamp
11. 11.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) junction (b) cell (c) bulb (d) diode
12. 12.⚡ What does an LED lamp mainly change electricity into? (a) movement (b) sound (c) heat (d) light
13. 13.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) neither line (d) both lines
14. 14.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) an open circuit (c) a short circuit (d) a parallel circuit
15. 15.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
16. 16.True or false: a circle with a cross is the symbol for a diode. (a) False (b) True
17. 17.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
18. 18.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
19. 19.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
20. 20.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
21. 21.🔍 Which is the odd one out? (a) a traffic signal (b) an electric iron (c) a night lamp (d) an LED lamp
22. 22.Which of these mainly makes sound? (a) a school bell (b) an electric drill (c) a street light (d) an electric iron
23. 23.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
24. 24.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) bulb (b) ammeter (c) wire (d) switch
25. 25.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
26. 26.🔍 Which is the odd one out? (a) fly kites in open fields (b) take cells out after use (c) stay away from pylons (d) throw cells in a fire
27. 27.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
28. 28.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
29. 29.Which of these mainly makes movement? (a) a mixer grinder (b) a water heater (c) an electric iron (d) a doorbell
30. 30.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
31. 31.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
32. 32.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
33. 33.🔌 Most metals are good … (a) conductors (b) magnets only (c) batteries (d) insulators
34. 34.⚡ What does a siren mainly change electricity into? (a) light (b) heat (c) sound (d) movement
35. 35.🔗 Series or parallel circuit: “each gets the full volts”? (a) series (b) parallel
36. 36.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
37. 37.Which of these is a conductor? (a) a glass marble (b) a plastic ruler (c) a cotton thread (d) a graphite rod
38. 38.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
39. 39.True or false: a push button springs back when let go. (a) True (b) False
40. 40.🔦 A circuit has a used-up (dead) 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

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