Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 407 · 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 of these is not safe? (a) fly kites in open fields (b) keep drinks far away (c) use small battery cells (d) climb an electric pole
2. 2.Which of these is true of a parallel circuit? (a) a single current path (b) used in house wiring (c) bulbs share the voltage (d) a break stops every bulb
3. 3.Which of these is a conductor? (a) a paper strip (b) a ceramic cup (c) a rubber eraser (d) a graphite rod
4. 4.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
5. 5.True or false: to use mains for a project is not safe. (a) False (b) True
6. 6.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
7. 7.🔋 2 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
8. 8.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
9. 9.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
10. 10.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
11. 11.💡 6 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?
12. 12.What does a slide switch do? (a) springs back when let go (b) closes near a magnet (c) closes when tipped over (d) slides side to side
13. 13.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
14. 14.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) cut (d) broken
15. 15.Which of these mainly makes movement? (a) an electric toy car (b) an LED lamp (c) a street light (d) a siren
16. 16.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
17. 17.Which of these is not safe? (a) use small battery cells (b) dry your hands first (c) take cells out after use (d) open a phone charger
18. 18.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) battery (b) voltmeter (c) wire (d) LED
19. 19.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
20. 20.🔦 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 brass key. Does the bulb glow? (a) No (b) Yes
21. 21.💡 4 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. Bulb 3 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
22. 22.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
23. 23.Which of these is safe? (a) poke things in a socket (b) fly a kite near wires (c) stay away from pylons (d) use a cable with cuts
24. 24.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a push button (c) a toggle switch (d) a slide switch
26. 26.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
27. 27.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
29. 29.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
30. 30.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
31. 31.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
32. 32.🔘 A bulb and a cell are joined through 6 switches on 6 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
33. 33.Which of these is a conductor? (a) a glass marble (b) a steel coin (c) a cotton thread (d) a plastic ruler
34. 34.🔋 4 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.Which of these mainly gives out light? (a) an electric kettle (b) an LED lamp (c) a room heater (d) a doorbell
36. 36.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is OFF (d) the switch is ON
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
38. 38.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
39. 39.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
40. 40.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a safe circuit (c) a parallel circuit (d) a short circuit

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