Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 641 · 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 an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.True or false: a toggle switch closes near a magnet. (a) False (b) True
3. 3.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
4. 4.Which of these mainly makes movement? (a) a siren (b) a street light (c) an electric drill (d) a doorbell
5. 5.What does a toggle switch do? (a) closes near a magnet (b) works only while pressed (c) flips up or down (d) slides side to side
6. 6.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
7. 7.Which of these is safe? (a) use a cable with cuts (b) open a phone charger (c) stop if a part gets hot (d) poke things in a socket
8. 8.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) an open circuit (d) a series circuit
9. 9.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
10. 10.🔍 Which is the odd one out? (a) aluminium foil (b) a dry cork (c) a wooden stick (d) a plastic straw
11. 11.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) a wall socket (c) a mains extension board (d) an inverter socket
12. 12.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) own switch for each bulb (d) bulbs share the voltage
13. 13.Which drawing is the symbol for a cell? (a) a circle with V inside (b) a small empty box (c) two equal parallel lines (d) a long and a short line
14. 14.🔍 Which is the odd one out? (a) a graphite rod (b) a cotton thread (c) a dry cork (d) a plastic ruler
15. 15.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) light energy (c) sound energy (d) chemical energy
16. 16.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
17. 17.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a switch that is ON (c) a cell (d) an insulator
18. 18.Which drawing is the symbol for a battery? (a) a line lifted at a gap (b) a plain rectangle (c) two or more cell symbols (d) a circle with M inside
19. 19.True or false: an iron nail is an insulator. (a) True (b) False
20. 20.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
21. 21.Which of these means the circuit is open? (a) the loop is complete (b) a cell is taken out (c) the switch is ON (d) all wires are joined
22. 22.🔋 5 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)? =
23. 23.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
24. 24.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) shout for an adult (b) pour water on them (c) wait and watch (d) pull them by the hand
25. 25.Which of these is not safe? (a) dry your hands first (b) poke things in a socket (c) keep drinks far away (d) stop if a part gets hot
26. 26.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
27. 27.True or false: a circle with A inside is the symbol for a wire. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) climb an electric pole (b) take cells out after use (c) stop if a part gets hot (d) stay away from pylons
29. 29.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
30. 30.Which of these is a conductor? (a) a paper strip (b) a plastic ruler (c) a ceramic cup (d) a safety pin
31. 31.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
32. 32.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) a complete loop (d) one loose end
33. 33.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a slide switch (c) a reed switch (d) a push button
34. 34.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
35. 35.🔍 Which is the odd one out? (a) a street light (b) a table fan (c) an electric drill (d) a ceiling fan
36. 36.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) bulb (b) cell (c) battery (d) ammeter
38. 38.🔋 How many 2 V cells must be joined in series to give 14 V?
39. 39.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
40. 40.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity

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