Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 584 · 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.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
2. 2.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.⚡ What does a night lamp mainly change electricity into? (a) heat (b) movement (c) light (d) sound
4. 4.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) stores current (c) changes the voltage (d) makes electricity
5. 5.Which of these means the circuit is open? (a) a cell is taken out (b) the loop is complete (c) all wires are joined (d) the switch is ON
6. 6.🔍 Which is the odd one out? (a) a steel spoon (b) a plastic straw (c) aluminium foil (d) a metal paper clip
7. 7.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) No (b) Yes
9. 9.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
10. 10.True or false: to fly kites in open fields is safe. (a) True (b) False
11. 11.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) Yes (b) No
12. 12.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
13. 13.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a small battery pack (c) an inverter socket (d) a wall socket
14. 14.Which of these is a conductor? (a) a copper wire (b) a glass marble (c) a rubber eraser (d) a plastic ruler
15. 15.🔍 Which is the odd one out? (a) a traffic signal (b) a tube light (c) an electric iron (d) a night lamp
16. 16.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
17. 17.✏️ In a circuit diagram, which part is drawn as a straight line? (a) ammeter (b) switch (c) cell (d) wire
18. 18.True or false: a line lifted at a gap is the symbol for a capacitor. (a) False (b) True
19. 19.Which drawing is the symbol for a bulb? (a) a straight line (b) one tall, one short bar (c) a circle with an X in it (d) a dot where wires meet
20. 20.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
21. 21.True or false: “a single current path” is true of a series circuit. (a) False (b) True
22. 22.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) sound energy (c) nuclear energy (d) electrical energy
23. 23.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) LED (b) junction (c) cell (d) diode
24. 24.Which of these mainly gives out light? (a) a ceiling fan (b) an LED lamp (c) an electric drill (d) a room heater
25. 25.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
26. 26.⚡ What does a torch mainly change electricity into? (a) light (b) heat (c) sound (d) movement
27. 27.Which of these is an insulator? (a) a metal paper clip (b) a steel spoon (c) a steel coin (d) a plastic straw
28. 28.🔍 Which is the odd one out? (a) poke things in a socket (b) use mains for a project (c) take cells out after use (d) touch a fallen wire
29. 29.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
30. 30.🔋 Does an air conditioner give electricity or use electricity? (a) gives electricity (b) uses electricity
31. 31.Which of these is not safe? (a) stay away from pylons (b) take cells out after use (c) use small battery cells (d) poke things in a socket
32. 32.⚡ What does a ceiling fan mainly change electricity into? (a) light (b) sound (c) heat (d) movement
33. 33.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
34. 34.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) LED (b) battery (c) ammeter (d) wire
35. 35.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
36. 36.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
37. 37.True or false: a straight line is the symbol for a cell. (a) True (b) False
38. 38.True or false: a woollen thread is a conductor. (a) True (b) False
39. 39.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a fuse or MCB (d) a long wire
40. 40.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series

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