Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 327 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.Which of these means the circuit is open? (a) the switch is ON (b) a wire has come loose (c) all wires are joined (d) the loop is complete
3. 3.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
4. 4.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) junction (b) bulb (c) cell (d) motor
5. 5.Which drawing is the symbol for a junction? (a) a line lifted at a gap (b) a circle with A inside (c) a dot where wires meet (d) a small empty box
6. 6.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) one loose end (d) a complete loop
7. 7.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
8. 8.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) sound (c) a magnet (d) friction
9. 9.🔘 What does a switch do in a circuit? (a) stores current (b) changes the voltage (c) makes electricity (d) opens or closes the loop
10. 10.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) sound energy (c) light energy (d) movement energy
12. 12.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) cell (b) bulb (c) wire (d) ammeter
13. 13.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
14. 14.💡 5 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
15. 15.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) dotted circles (d) little stars
16. 16.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
17. 17.Which drawing is the symbol for a diode? (a) one tall, one short bar (b) a dot where wires meet (c) triangle against a bar (d) a long and a short line
18. 18.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a tilt switch (c) a slide switch (d) a toggle switch
19. 19.🔦 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 graphite rod. Does the bulb glow? (a) No (b) Yes
20. 20.True or false: a brass key is an insulator. (a) True (b) False
21. 21.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic makes current (d) plastic is an insulator
23. 23.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
24. 24.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
25. 25.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
26. 26.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
28. 28.🔋 How many 1.5 V cells must be joined in series to give 3 V?
29. 29.Which of these is safe? (a) touch a fallen wire (b) build with an adult near (c) throw cells in a fire (d) touch a switch when wet
30. 30.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) in series (d) by Wi-Fi
31. 31.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
32. 32.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
33. 33.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) a circle with V inside (c) a dot where wires meet (d) a plain rectangle
34. 34.Which of these means the circuit is open? (a) the switch is OFF (b) all wires are joined (c) the switch is ON (d) the loop is complete
35. 35.🔍 Which is the odd one out? (a) an exhaust fan (b) a mixer grinder (c) an electric drill (d) a night lamp
36. 36.True or false: a ceramic cup is an insulator. (a) True (b) False
37. 37.⚡ What does a water heater mainly change electricity into? (a) sound (b) light (c) movement (d) heat
38. 38.🔌 Most metals are good … (a) magnets only (b) batteries (c) insulators (d) conductors
39. 39.True or false: a slide switch springs back when let go. (a) False (b) True
40. 40.Which of these is true of a series circuit? (a) each gets the full volts (b) bulbs share the voltage (c) many paths for current (d) used in house wiring

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