Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 615 · 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.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) electric current (c) a magnet (d) sound
2. 2.💡 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
3. 3.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
4. 4.True or false: a school bell mainly makes movement. (a) True (b) False
5. 5.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) wind energy (c) sound energy (d) electrical energy
6. 6.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
7. 7.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
8. 8.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a complete loop (d) a broken path
9. 9.⚡ What does an electric toy car mainly change electricity into? (a) heat (b) sound (c) movement (d) light
10. 10.True or false: to take cells out after use is safe. (a) False (b) True
11. 11.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
12. 12.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
13. 13.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
14. 14.Which of these is a conductor? (a) a woollen thread (b) a ceramic cup (c) aluminium foil (d) a wooden stick
15. 15.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
16. 16.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
17. 17.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a push button (c) a slide switch (d) a reed switch
18. 18.Which of these is safe? (a) keep drinks far away (b) poke things in a socket (c) touch a switch when wet (d) throw cells in a fire
19. 19.True or false: a long and a short line is the symbol for a cell. (a) False (b) True
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
21. 21.What does a reed switch do? (a) closes near a magnet (b) springs back when let go (c) flips up or down (d) closes when tipped over
22. 22.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a rubber band. Does the bulb glow? (a) Yes (b) No
23. 23.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
24. 24.🔦 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 glass marble. Does the bulb glow? (a) No (b) Yes
25. 25.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
26. 26.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
27. 27.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) cut them open (d) give them for recycling
28. 28.Which of these is an insulator? (a) a copper wire (b) a brass key (c) a rubber band (d) a steel coin
29. 29.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
30. 30.True or false: a glass marble is an insulator. (a) False (b) True
31. 31.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) symbols are heavier (d) to hide the circuit
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
33. 33.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) the switch is OFF
34. 34.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.True or false: to use small battery cells is not safe. (a) True (b) False
36. 36.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
37. 37.What does a push button do? (a) springs back when let go (b) closes when tipped over (c) stays where you flip it (d) slides side to side
38. 38.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) a kind of bulb (d) two or more cells joined
39. 39.🔍 Which is the odd one out? (a) keep drinks far away (b) dry your hands first (c) fly kites in open fields (d) fly a kite near wires
40. 40.Which drawing is the symbol for a bulb? (a) a circle with V inside (b) one tall, one short bar (c) a circle with an X in it (d) a dot where wires meet

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