Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 525 · 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.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
2. 2.True or false: to build with an adult near is not safe. (a) True (b) False
3. 3.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a reed switch (c) a toggle switch (d) a tilt switch
4. 4.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
5. 5.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 1.5 V (d) 0.5 V
7. 7.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) fly kites in open fields (b) dry your hands first (c) climb an electric pole (d) use small battery cells
9. 9.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a steel coin. Does the bulb glow? (a) No (b) Yes
11. 11.Which of these gives us electricity? (a) a water pump (b) a computer (c) a mobile phone (d) a solar panel
12. 12.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
13. 13.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
14. 14.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
16. 16.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
17. 17.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
18. 18.Which of these is a conductor? (a) a cotton thread (b) a rubber band (c) a metal paper clip (d) a paper strip
19. 19.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) when either is ON (c) only when both are OFF (d) only when both are ON
20. 20.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
21. 21.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) an inverter socket (d) a mains extension board
22. 22.What does a push button do? (a) slides side to side (b) closes when tipped over (c) closes near a magnet (d) springs back when let go
23. 23.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
24. 24.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) sound energy (c) light energy (d) chemical energy
25. 25.💡 6 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. How many bulbs glow?
26. 26.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.Which of these mainly gives out light? (a) a night lamp (b) an electric iron (c) a room heater (d) a toaster
28. 28.Which of these is safe? (a) throw cells in a fire (b) poke things in a socket (c) use mains for a project (d) use small battery cells
29. 29.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a doorbell (b) a loudspeaker (c) an exhaust fan (d) a siren
31. 31.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
32. 32.What does a slide switch do? (a) springs back when let go (b) works only while pressed (c) closes near a magnet (d) slides side to side
33. 33.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a short circuit (c) a parallel circuit (d) a safe circuit
34. 34.🔍 Which is the odd one out? (a) a street light (b) a traffic signal (c) an electric drill (d) a tube light
35. 35.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
36. 36.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
37. 37.Which of these mainly makes sound? (a) an LED lamp (b) a table fan (c) an electric iron (d) a loudspeaker
38. 38.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
39. 39.True or false: a brass key is an insulator. (a) True (b) False
40. 40.🔁 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

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