Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 280 · 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.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
2. 2.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
3. 3.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
4. 4.True or false: to touch a switch when wet is not safe. (a) False (b) True
5. 5.True or false: triangle against a bar is the symbol for a diode. (a) True (b) False
6. 6.True or false: a copper wire is a conductor. (a) False (b) True
7. 7.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) battery (b) capacitor (c) resistor (d) motor
8. 8.💡 4 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. Bulbs 3 and 4 are taken out of their holders. How many bulbs glow?
9. 9.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the filament (d) the switch
11. 11.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
12. 12.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
13. 13.💡 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
14. 14.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) a bigger voltage (d) the same voltage
15. 15.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
16. 16.True or false: a night lamp mainly gives out light. (a) True (b) False
17. 17.🔋 Does a generator give electricity or use electricity? (a) gives electricity (b) uses electricity
18. 18.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
19. 19.True or false: a tilt switch closes when tipped over. (a) False (b) True
20. 20.Which of these is not safe? (a) use small battery cells (b) take cells out after use (c) open a phone charger (d) build with an adult near
21. 21.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) switch (b) resistor (c) capacitor (d) LED
22. 22.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
23. 23.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
24. 24.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
26. 26.🔘 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 ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
27. 27.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) when either is ON (d) never
28. 28.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to make it colourful (d) to hide the circuit
29. 29.True or false: to fly kites in open fields is not safe. (a) False (b) True
30. 30.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) one single wire (d) a kind of bulb
31. 31.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a small battery pack (d) a mains extension board
32. 32.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
33. 33.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
34. 34.Which of these is not safe? (a) stay away from pylons (b) fly kites in open fields (c) poke things in a socket (d) take cells out after use
35. 35.True or false: a rice cooker mainly gives out light. (a) True (b) False
36. 36.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
37. 37.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
38. 38.True or false: a slide switch springs back when let go. (a) True (b) False
39. 39.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) battery (c) ammeter (d) resistor
40. 40.True or false: an electric kettle mainly gives out heat. (a) False (b) True

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