Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 437 · 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 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 steel coin. Does the bulb glow? (a) No (b) Yes
2. 2.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
3. 3.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
4. 4.💡 2 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?
5. 5.Which of these is safe? (a) use small battery cells (b) climb an electric pole (c) use a cable with cuts (d) throw cells in a fire
6. 6.🔘 When a switch is ON, the circuit is … (a) closed (b) broken (c) cut (d) open
7. 7.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) many paths for current (d) a single current path
8. 8.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
9. 9.Which of these gives us electricity? (a) a water pump (b) a wind turbine (c) a computer (d) a washing machine
10. 10.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
11. 11.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
12. 12.What does a slide switch do? (a) springs back when let go (b) works only while pressed (c) stays where you flip it (d) slides side to side
13. 13.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
14. 14.What does a reed switch do? (a) closes when tipped over (b) stays where you flip it (c) works only while pressed (d) closes near a magnet
15. 15.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
16. 16.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) voltmeter (b) LED (c) switch (d) cell
17. 17.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the steel shaft (d) the plastic handle
18. 18.💡 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?
19. 19.🔍 Which is the odd one out? (a) touch a switch when wet (b) build with an adult near (c) open a phone charger (d) throw cells in a fire
20. 20.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
21. 21.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
22. 22.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a complete loop (d) a plastic gap
23. 23.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
24. 24.💡 6 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 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
25. 25.Which of these is a conductor? (a) a ceramic cup (b) a glass marble (c) a copper wire (d) a wooden stick
26. 26.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
27. 27.🔦 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
28. 28.True or false: a long and a short line is the symbol for a battery. (a) False (b) True
29. 29.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) motor (b) diode (c) cell (d) resistor
30. 30.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
31. 31.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) light energy (c) movement energy (d) sound energy
32. 32.🔍 Which is the odd one out? (a) a metal paper clip (b) a safety pin (c) a steel coin (d) a glass marble
33. 33.True or false: a graphite rod is an insulator. (a) False (b) True
34. 34.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
35. 35.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a safety pin. Does the bulb glow? (a) No (b) Yes
36. 36.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
37. 37.🔋 Does a washing machine give electricity or use electricity? (a) gives electricity (b) uses electricity
38. 38.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
39. 39.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) Yes (b) No
40. 40.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) each gets full voltage (d) to save copper only

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