Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 140 · 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: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
2. 2.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) to make bulbs dim (d) so all go off together
3. 3.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
4. 4.🔦 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
5. 5.What does a tilt switch do? (a) closes when tipped over (b) flips up or down (c) closes near a magnet (d) springs back when let go
6. 6.⚡ What does a night lamp mainly change electricity into? (a) light (b) movement (c) sound (d) heat
7. 7.What does a reed switch do? (a) closes near a magnet (b) works only while pressed (c) springs back when let go (d) flips up or down
8. 8.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
9. 9.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to hide the circuit (d) to make it colourful
10. 10.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
11. 11.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
12. 12.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a closed circuit (d) a series circuit
13. 13.🔍 Which is the odd one out? (a) a copper wire (b) a plastic ruler (c) a safety pin (d) aluminium foil
14. 14.⚡ What does a water heater mainly change electricity into? (a) light (b) sound (c) heat (d) movement
15. 15.True or false: a paper strip is a conductor. (a) True (b) False
16. 16.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) wire (b) voltmeter (c) LED (d) junction
17. 17.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) one bulb out, all go out (d) one out, the rest glow
18. 18.🔦 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) Yes (b) No
19. 19.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
20. 20.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) a break stops every bulb (d) a single current path
21. 21.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
22. 22.What does a toggle switch do? (a) works only while pressed (b) stays where you flip it (c) slides side to side (d) closes near a magnet
23. 23.True or false: to touch a switch when wet is not safe. (a) False (b) True
24. 24.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) an inverter socket (d) a small battery pack
25. 25.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) battery (c) wire (d) cell
26. 26.Which of these is not safe? (a) stay away from pylons (b) build with an adult near (c) use mains for a project (d) dry your hands first
27. 27.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) one out, the rest glow (d) used in house wiring
28. 28.True or false: one tall, one short bar is the symbol for an ammeter. (a) False (b) True
29. 29.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) chemical energy (c) sound energy (d) light energy
30. 30.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) double the voltage (c) half the voltage (d) no voltage
33. 33.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
34. 34.True or false: to open a phone charger is not safe. (a) True (b) False
35. 35.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
36. 36.Which of these is safe? (a) fly kites in open fields (b) throw cells in a fire (c) touch a switch when wet (d) open a phone charger
37. 37.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 3 glow? (a) Yes (b) No
38. 38.💡 6 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
39. 39.🔋 How many 1.5 V cells must be joined in series to give 3 V?
40. 40.⚡ What does a rice cooker mainly change electricity into? (a) sound (b) movement (c) light (d) heat

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