Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 837 · 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 it safe to use mains for a project? (a) not safe (b) safe
2. 2.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
3. 3.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
4. 4.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) light (c) heat (d) sound
5. 5.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
6. 6.True or false: a circle with a cross is the symbol for a resistor. (a) True (b) False
7. 7.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
8. 8.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
9. 9.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
10. 10.True or false: a buzzer mainly makes sound. (a) True (b) False
11. 11.True or false: a reed switch flips up or down. (a) False (b) True
12. 12.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it is just untidy (c) water carries current (d) it spoils the paint
13. 13.🔍 Which is the odd one out? (a) a woollen thread (b) a steel coin (c) a plastic ruler (d) a paper strip
14. 14.True or false: a slide switch flips up or down. (a) False (b) True
15. 15.🔘 A bulb and a cell are joined through 4 switches on 4 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?
16. 16.True or false: two or more cell symbols is the symbol for a wire. (a) False (b) True
17. 17.🔁 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
18. 18.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
19. 19.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
20. 20.Which of these is a conductor? (a) a steel spoon (b) a plastic ruler (c) a rubber eraser (d) a cotton thread
21. 21.🔌 Which metal is used for most electric wires at home? (a) glass (b) plastic (c) rubber (d) copper
22. 22.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
23. 23.True or false: a circle with an X in it is the symbol for a diode. (a) False (b) True
24. 24.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
25. 25.⚡ What does an electric toy car mainly change electricity into? (a) movement (b) light (c) sound (d) heat
26. 26.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
27. 27.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to hide the circuit (d) to make it colourful
28. 28.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they all go out (d) they keep glowing
29. 29.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
30. 30.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.Which drawing is the symbol for a cell? (a) a small empty box (b) a circle with V inside (c) a long and a short line (d) triangle against a bar
32. 32.🔦 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
33. 33.True or false: a line lifted at a gap is the symbol for a junction. (a) False (b) True
34. 34.Which of these is an insulator? (a) a copper wire (b) a graphite rod (c) a steel coin (d) a cotton thread
35. 35.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) a single current path (d) used in house wiring
36. 36.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) little stars (d) wavy lines
37. 37.Which of these uses electricity? (a) a wind turbine (b) a refrigerator (c) a cell (d) a solar panel
38. 38.True or false: a mixer grinder mainly makes movement. (a) True (b) False
39. 39.Which of these mainly gives out light? (a) a mixer grinder (b) a doorbell (c) an electric kettle (d) a street light
40. 40.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) wire (b) diode (c) bulb (d) capacitor

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