Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 555 · 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 plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.🔦 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 steel coin. Does the bulb glow? (a) No (b) Yes
3. 3.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
4. 4.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) resistor (b) junction (c) battery (d) bulb
5. 5.🔍 Which is the odd one out? (a) stop if a part gets hot (b) throw cells in a fire (c) fly a kite near wires (d) climb an electric pole
6. 6.🔍 Which is the odd one out? (a) a tube light (b) a room heater (c) a torch (d) a night lamp
7. 7.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
8. 8.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
9. 9.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
10. 10.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
11. 11.Which of these is true of a series circuit? (a) many paths for current (b) bulbs share the voltage (c) one out, the rest glow (d) each gets the full volts
12. 12.Which of these is an insulator? (a) a graphite rod (b) a steel spoon (c) a ceramic cup (d) a safety pin
13. 13.Which of these gives us electricity? (a) a solar panel (b) a television (c) a water pump (d) a mobile phone
14. 14.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
16. 16.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
17. 17.💡 In a series circuit, how many paths does the current have? (a) one (b) two (c) none (d) one for each bulb
18. 18.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) dry your hands first (b) fly kites in open fields (c) use small battery cells (d) touch a switch when wet
20. 20.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) both of them (d) only one
21. 21.Which of these is safe? (a) poke things in a socket (b) stay away from pylons (c) fly a kite near wires (d) throw cells in a fire
22. 22.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
23. 23.Which of these uses electricity? (a) a cell (b) a generator (c) a mobile phone (d) a battery
24. 24.Which of these is safe? (a) use a cable with cuts (b) touch a switch when wet (c) use small battery cells (d) poke things in a socket
25. 25.Which of these mainly gives out heat? (a) a room heater (b) an LED lamp (c) a buzzer (d) an electric toy car
26. 26.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
27. 27.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
28. 28.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
29. 29.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
30. 30.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.🔌 Is a ceramic cup a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
33. 33.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
34. 34.Which of these is safe? (a) throw cells in a fire (b) touch a switch when wet (c) take cells out after use (d) fly a kite near wires
35. 35.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
36. 36.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
37. 37.True or false: a rubber band is a conductor. (a) False (b) True
38. 38.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
39. 39.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
40. 40.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe

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