Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 21 · 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 metal is used for most electric wires at home? (a) rubber (b) glass (c) plastic (d) copper
2. 2.🔍 Which is the odd one out? (a) use mains for a project (b) open a phone charger (c) touch a fallen wire (d) use small battery cells
3. 3.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.🔘 A bulb and a cell are joined through 3 switches on 3 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?
5. 5.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
6. 6.Which of these is a conductor? (a) a graphite rod (b) a cotton thread (c) a glass marble (d) a paper strip
7. 7.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
8. 8.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
9. 9.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
10. 10.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a series circuit (d) a full circuit
11. 11.Which of these uses electricity? (a) a cell (b) a battery (c) a generator (d) a water pump
12. 12.True or false: a wooden stick is an insulator. (a) True (b) False
13. 13.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) junction (b) wire (c) resistor (d) cell
14. 14.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
15. 15.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
16. 16.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) to hide the circuit (d) quick and clear for all
17. 17.Which of these uses electricity? (a) a battery (b) a computer (c) a generator (d) a wind turbine
18. 18.Which drawing is the symbol for a motor? (a) a small empty box (b) a circle with M inside (c) a circle with a cross (d) a plain rectangle
19. 19.🔋 How many 1.5 V cells must be joined in series to give 3 V?
20. 20.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
21. 21.🔍 Which is the odd one out? (a) throw cells in a fire (b) use mains for a project (c) touch a switch when wet (d) dry your hands first
22. 22.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
23. 23.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a switch that is ON (d) a cell
24. 24.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
25. 25.Which of these is not safe? (a) stay away from pylons (b) poke things in a socket (c) fly kites in open fields (d) take cells out after use
26. 26.💡 3 identical bulbs are joined in series 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
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they get dimmer (c) they all go out (d) they explode
28. 28.Which of these is an insulator? (a) a plastic ruler (b) a brass key (c) a graphite rod (d) a steel spoon
29. 29.What does a toggle switch do? (a) closes when tipped over (b) closes near a magnet (c) slides side to side (d) flips up or down
30. 30.True or false: a slide switch closes near a magnet. (a) True (b) False
31. 31.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
32. 32.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
33. 33.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
34. 34.Which of these means the circuit is open? (a) the switch is ON (b) the bulb is unscrewed (c) the loop is complete (d) all wires are joined
35. 35.True or false: a buzzer mainly makes movement. (a) False (b) True
36. 36.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
37. 37.True or false: two equal parallel lines is the symbol for a capacitor. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a buzzer (b) a doorbell (c) a school bell (d) a tube light
39. 39.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
40. 40.🔦 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 woollen thread. Does the bulb glow? (a) No (b) Yes

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