Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 787 · 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 shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.Which drawing is the symbol for a switch? (a) many long-short pairs (b) a circle with M inside (c) a line lifted at a gap (d) a circle with a cross
3. 3.🔦 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 steel spoon. Does the bulb glow? (a) Yes (b) No
4. 4.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a toggle switch (c) a slide switch (d) a reed switch
5. 5.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
6. 6.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
7. 7.True or false: a steel spoon is an insulator. (a) True (b) False
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
9. 9.🔍 Which is the odd one out? (a) touch a switch when wet (b) throw cells in a fire (c) build with an adult near (d) use mains for a project
10. 10.🔋 6 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
11. 11.What does a reed switch do? (a) flips up or down (b) closes near a magnet (c) springs back when let go (d) closes when tipped over
12. 12.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
13. 13.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
14. 14.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
15. 15.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
16. 16.True or false: a circle with M inside is the symbol for a switch. (a) False (b) True
17. 17.Which of these is an insulator? (a) a metal paper clip (b) an iron nail (c) a copper wire (d) a wooden stick
18. 18.Which drawing is the symbol for a voltmeter? (a) a straight line (b) a line lifted at a gap (c) a circle with V inside (d) a plain rectangle
19. 19.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a wire has come loose (d) the switch is ON
20. 20.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) shout for an adult (b) wait and watch (c) pour water on them (d) pull them by the hand
21. 21.True or false: to use mains for a project is not safe. (a) True (b) False
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) Yes (b) No
23. 23.Which drawing is the symbol for a cell? (a) a plain rectangle (b) one tall, one short bar (c) triangle, bar and arrows (d) a circle with A inside
24. 24.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
25. 25.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
26. 26.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
28. 28.💡 5 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. Does bulb 4 glow? (a) Yes (b) No
29. 29.True or false: “a single current path” is true of a series circuit. (a) False (b) True
30. 30.Which of these is an insulator? (a) a plastic straw (b) aluminium foil (c) a steel spoon (d) an iron nail
31. 31.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) never (c) when both are OFF (d) when either is ON
32. 32.🔦 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 cotton thread. Does the bulb glow? (a) No (b) Yes
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
34. 34.🔋 7 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
35. 35.Which drawing is the symbol for a battery? (a) a plain rectangle (b) two or more cell symbols (c) a circle with A inside (d) a circle with V inside
36. 36.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 230 V (c) 9 V (d) 12 V
37. 37.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
38. 38.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
39. 39.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False

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