Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 695 · 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 is the odd one out? (a) a woollen thread (b) a safety pin (c) a paper strip (d) a ceramic cup
2. 2.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) switch (c) voltmeter (d) diode
3. 3.True or false: a night lamp mainly makes sound. (a) False (b) True
4. 4.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
5. 5.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a closed circuit (c) a full circuit (d) an open circuit
6. 6.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) wavy lines (d) little stars
8. 8.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
9. 9.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
10. 10.⚡ What does a doorbell mainly change electricity into? (a) movement (b) light (c) sound (d) heat
11. 11.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
12. 12.What does a reed switch do? (a) closes near a magnet (b) closes when tipped over (c) slides side to side (d) stays where you flip it
13. 13.🔍 Which is the odd one out? (a) touch a fallen wire (b) stop if a part gets hot (c) dry your hands first (d) stay away from pylons
14. 14.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
15. 15.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
16. 16.💡 6 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. How many bulbs glow?
17. 17.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) wire (b) resistor (c) diode (d) voltmeter
18. 18.True or false: triangle, bar and arrows is the symbol for a motor. (a) True (b) False
19. 19.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
20. 20.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
21. 21.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) nuclear energy (c) sound energy (d) electrical energy
22. 22.True or false: to use mains for a project is not safe. (a) False (b) True
23. 23.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) not joined (d) by Wi-Fi
24. 24.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) open a phone charger (b) touch a fallen wire (c) climb an electric pole (d) fly kites in open fields
26. 26.🔍 Which is the odd one out? (a) a doorbell (b) a school bell (c) a siren (d) an electric iron
27. 27.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) sound (c) movement (d) heat
28. 28.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
29. 29.⚡ What does a toaster mainly change electricity into? (a) heat (b) sound (c) movement (d) light
30. 30.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
31. 31.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.True or false: a loudspeaker mainly makes movement. (a) False (b) True
33. 33.Which drawing is the symbol for a cell? (a) a circle with M inside (b) one tall, one short bar (c) a circle with an X in it (d) triangle against a bar
34. 34.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
35. 35.Which of these is safe? (a) open a phone charger (b) use mains for a project (c) touch a switch when wet (d) keep drinks far away
36. 36.Which of these is safe? (a) fly a kite near wires (b) throw cells in a fire (c) touch a fallen wire (d) build with an adult near
37. 37.🔍 Which is the odd one out? (a) a tube light (b) an LED lamp (c) a night lamp (d) a table fan
38. 38.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
39. 39.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.🔍 Which is the odd one out? (a) poke things in a socket (b) touch a switch when wet (c) throw cells in a fire (d) stay away from pylons

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