Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 473 · 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.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
3. 3.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.🔦 A circuit has a used-up (dead) 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 graphite rod. Does the bulb glow? (a) Yes (b) No
5. 5.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
6. 6.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a reed switch (c) a push button (d) a toggle switch
7. 7.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a mains extension board (d) a small battery pack
8. 8.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a short circuit (d) a safe circuit
9. 9.Which of these is not safe? (a) dry your hands first (b) fly kites in open fields (c) use a cable with cuts (d) use small battery cells
10. 10.🔌 A gap of dry air between two wires acts as … (a) a cell (b) a switch that is ON (c) a conductor (d) an insulator
11. 11.🔍 Which is the odd one out? (a) a buzzer (b) a torch (c) a loudspeaker (d) a doorbell
12. 12.🔍 Which is the odd one out? (a) touch a switch when wet (b) take cells out after use (c) use mains for a project (d) use a cable with cuts
13. 13.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
14. 14.🔋 How many 3 V cells must be joined in series to give 24 V?
15. 15.🔍 Which is the odd one out? (a) an LED lamp (b) an exhaust fan (c) a table fan (d) a mixer grinder
16. 16.Which of these mainly makes movement? (a) a school bell (b) a buzzer (c) an exhaust fan (d) a doorbell
17. 17.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
18. 18.🔦 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 band. Does the bulb glow? (a) Yes (b) No
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
20. 20.True or false: a slide switch works only while pressed. (a) True (b) False
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
22. 22.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
23. 23.💡 3 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
24. 24.True or false: a brass key is an insulator. (a) False (b) True
25. 25.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
26. 26.🔍 Which is the odd one out? (a) an LED lamp (b) a water heater (c) a street light (d) a tube light
27. 27.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
28. 28.💡 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
29. 29.True or false: a graphite rod is an insulator. (a) True (b) False
30. 30.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
31. 31.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) electrical energy (c) nuclear energy (d) wind energy
32. 32.✏️ 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
33. 33.True or false: a safety pin is an insulator. (a) False (b) True
34. 34.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
35. 35.⚡ What does an exhaust fan mainly change electricity into? (a) light (b) sound (c) heat (d) movement
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
37. 37.Which of these is not safe? (a) build with an adult near (b) stop if a part gets hot (c) take cells out after use (d) fly a kite near wires
38. 38.Which of these mainly makes sound? (a) an exhaust fan (b) an electric iron (c) a toaster (d) a buzzer
39. 39.True or false: to build with an adult near is not safe. (a) False (b) True
40. 40.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids