Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 150 · 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.💡 5 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. Bulbs 1 and 3 are taken out of their holders. How many bulbs glow?
2. 2.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
3. 3.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
4. 4.True or false: a mixer grinder mainly gives out light. (a) True (b) False
5. 5.Which of these is a conductor? (a) a paper strip (b) a glass marble (c) a plastic straw (d) a graphite rod
6. 6.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) own switch for each bulb (d) a single current path
7. 7.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
8. 8.Which of these is a conductor? (a) a plastic ruler (b) aluminium foil (c) a rubber eraser (d) a paper strip
9. 9.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
10. 10.True or false: a circle with a cross is the symbol for a voltmeter. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) a safety pin (b) a steel coin (c) a metal paper clip (d) a ceramic cup
12. 12.⚡ What does a torch mainly change electricity into? (a) movement (b) light (c) heat (d) sound
13. 13.True or false: to touch a fallen wire is safe. (a) False (b) True
14. 14.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
15. 15.🔋 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
16. 16.Which of these is a conductor? (a) a woollen thread (b) a glass marble (c) a plastic straw (d) a steel coin
17. 17.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
18. 18.🔌 Which metal is used for most electric wires at home? (a) glass (b) plastic (c) copper (d) rubber
19. 19.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) LED (c) resistor (d) ammeter
20. 20.Which of these is an insulator? (a) a copper wire (b) aluminium foil (c) a plastic ruler (d) an iron nail
21. 21.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a wooden stick. Does the bulb glow? (a) Yes (b) No
22. 22.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) ammeter (b) wire (c) motor (d) bulb
23. 23.💡 5 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 4 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
24. 24.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) diode (b) resistor (c) cell (d) switch
25. 25.True or false: to poke things in a socket is safe. (a) True (b) False
26. 26.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
27. 27.True or false: to use mains for a project is safe. (a) True (b) False
28. 28.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
29. 29.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.What does a tilt switch do? (a) slides side to side (b) works only while pressed (c) springs back when let go (d) closes when tipped over
31. 31.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a series circuit (d) a closed circuit
32. 32.🔌 Most metals are good … (a) conductors (b) magnets only (c) batteries (d) insulators
33. 33.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
34. 34.True or false: a room heater mainly gives out light. (a) True (b) False
35. 35.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) one out, the rest glow (d) used in house wiring
36. 36.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
37. 37.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) wavy lines (d) straight lines
38. 38.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
39. 39.True or false: an electric kettle mainly makes sound. (a) True (b) False
40. 40.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True

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