Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 459 · 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 of these means the circuit is open? (a) a cell is taken out (b) the loop is complete (c) the switch is ON (d) all wires are joined
2. 2.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) switch (b) motor (c) cell (d) LED
3. 3.🔦 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 paper strip. Does the bulb glow? (a) Yes (b) No
4. 4.True or false: a slide switch flips up or down. (a) True (b) False
5. 5.🔋 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)? =
6. 6.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a broken path (d) a plastic gap
7. 7.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
8. 8.⚡ What does a buzzer mainly change electricity into? (a) light (b) sound (c) movement (d) heat
9. 9.⚡ What does a water heater mainly change electricity into? (a) light (b) heat (c) movement (d) sound
10. 10.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) pull them by the hand (c) shout for an adult (d) wait and watch
11. 11.True or false: a tilt switch closes when tipped over. (a) True (b) False
12. 12.Which of these is true of a parallel circuit? (a) many paths for current (b) bulbs share the voltage (c) a break stops every bulb (d) a single current path
13. 13.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) sound (d) electric current
14. 14.What does a reed switch do? (a) stays where you flip it (b) slides side to side (c) closes near a magnet (d) springs back when let go
15. 15.🔍 Which is the odd one out? (a) a brass key (b) a rubber band (c) a woollen thread (d) a glass marble
16. 16.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) a switch with a lid (d) two or more cells joined
17. 17.🔌 Most metals are good … (a) magnets only (b) batteries (c) conductors (d) insulators
18. 18.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) wire (b) diode (c) resistor (d) motor
19. 19.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
20. 20.True or false: a toggle switch flips up or down. (a) False (b) True
21. 21.Which drawing is the symbol for a wire? (a) a straight line (b) one tall, one short bar (c) triangle, bar and arrows (d) two equal parallel lines
22. 22.Which of these mainly makes sound? (a) an electric iron (b) a school bell (c) an LED lamp (d) a mixer grinder
23. 23.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
24. 24.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
25. 25.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
26. 26.True or false: triangle, bar and arrows is the symbol for a resistor. (a) False (b) True
27. 27.What does a tilt switch do? (a) closes when tipped over (b) works only while pressed (c) closes near a magnet (d) springs back when let go
28. 28.Which of these is not safe? (a) fly kites in open fields (b) poke things in a socket (c) use small battery cells (d) build with an adult near
29. 29.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
30. 30.🔌 Which metal is used for most electric wires at home? (a) glass (b) copper (c) rubber (d) plastic
31. 31.True or false: to touch a fallen wire is safe. (a) True (b) False
32. 32.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a cell (c) a conductor (d) an insulator
33. 33.True or false: a school bell mainly gives out light. (a) True (b) False
34. 34.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
35. 35.🔦 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) No (b) Yes
36. 36.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
37. 37.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) bulbs share the voltage (d) own switch for each bulb
38. 38.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
39. 39.Which of these mainly gives out heat? (a) a room heater (b) an LED lamp (c) a table fan (d) a street light
40. 40.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles

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