Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 3 · 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 cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) electrical energy (c) sound energy (d) wind energy
2. 2.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is ON and D is ON. Does the bulb glow? (a) Yes (b) No
3. 3.🔍 Which is the odd one out? (a) a torch (b) a doorbell (c) a school bell (d) a buzzer
4. 4.Which of these is not safe? (a) use small battery cells (b) stop if a part gets hot (c) take cells out after use (d) use mains for a project
5. 5.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
6. 6.Which of these is true of a series circuit? (a) many paths for current (b) a break stops every bulb (c) used in house wiring (d) each gets the full volts
7. 7.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
8. 8.True or false: a circle with V inside is the symbol for a battery. (a) True (b) False
9. 9.Which of these is an insulator? (a) a safety pin (b) a wooden stick (c) an iron nail (d) a copper wire
10. 10.What does a reed switch do? (a) flips up or down (b) springs back when let go (c) works only while pressed (d) closes near a magnet
11. 11.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
12. 12.💡 2 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. All the bulbs are in place. How many bulbs glow?
13. 13.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when either is ON (c) when both are ON (d) when both are OFF
14. 14.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.Which drawing is the symbol for an ammeter? (a) triangle against a bar (b) two or more cell symbols (c) a circle with M inside (d) a circle with A inside
18. 18.🔍 Which is the odd one out? (a) a siren (b) a rice cooker (c) an electric iron (d) a room heater
19. 19.🔋 6 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)? =
20. 20.⚡ What does a traffic signal mainly change electricity into? (a) sound (b) light (c) movement (d) heat
21. 21.🔍 Which is the odd one out? (a) poke things in a socket (b) fly a kite near wires (c) touch a fallen wire (d) use small battery cells
22. 22.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire has come loose (c) a wire is cut (d) the switch is ON
23. 23.🔦 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 rubber eraser. Does the bulb glow? (a) No (b) Yes
24. 24.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) electric current (c) friction (d) sound
25. 25.🔍 Which is the odd one out? (a) a plastic ruler (b) a dry cork (c) a rubber band (d) aluminium foil
26. 26.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
27. 27.💡 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
28. 28.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) sound energy (c) chemical energy (d) movement energy
29. 29.Which drawing is the symbol for a resistor? (a) a plain rectangle (b) two equal parallel lines (c) a circle with A inside (d) a long and a short line
30. 30.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) pour water on them (c) wait and watch (d) shout for an adult
31. 31.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they get dimmer (d) they all go out
32. 32.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
33. 33.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic ruler (c) a cotton thread (d) a metal paper clip
34. 34.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.True or false: a straight line is the symbol for a wire. (a) True (b) False
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
37. 37.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic makes current (c) to make them heavy (d) plastic is a conductor
38. 38.Which drawing is the symbol for a junction? (a) a long and a short line (b) a circle with V inside (c) a circle with an X in it (d) a dot where wires meet
39. 39.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.Which drawing is the symbol for a battery? (a) a circle with a cross (b) two or more cell symbols (c) a circle with V inside (d) two equal parallel lines

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