Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 588 · 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 the switch is ON, the circuit is closed and current flows. (a) False (b) True
2. 2.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
3. 3.🔍 Which is the odd one out? (a) build with an adult near (b) use mains for a project (c) keep drinks far away (d) stay away from pylons
4. 4.🔍 Which is the odd one out? (a) a table fan (b) an electric toy car (c) a mixer grinder (d) a loudspeaker
5. 5.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
6. 6.Which of these mainly gives out light? (a) a traffic signal (b) a ceiling fan (c) a water heater (d) a loudspeaker
7. 7.Which drawing is the symbol for a battery? (a) a plain rectangle (b) a circle with a cross (c) a circle with A inside (d) two or more cell symbols
8. 8.🔦 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) Yes (b) No
9. 9.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) one for each bulb (d) two
10. 10.True or false: to poke things in a socket is safe. (a) False (b) True
11. 11.True or false: a reed switch stays where you flip it. (a) False (b) True
12. 12.Which of these is safe? (a) stop if a part gets hot (b) use mains for a project (c) fly a kite near wires (d) touch a fallen wire
13. 13.True or false: a woollen thread is an insulator. (a) True (b) False
14. 14.🔋 What is a battery? (a) two or more cells joined (b) a kind of bulb (c) one single wire (d) a switch with a lid
15. 15.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
16. 16.True or false: triangle, bar and arrows is the symbol for a wire. (a) False (b) True
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
18. 18.Which of these is safe? (a) fly a kite near wires (b) stay away from pylons (c) throw cells in a fire (d) use mains for a project
19. 19.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when either is ON (c) never (d) when both are ON
20. 20.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) junction (b) switch (c) motor (d) capacitor
21. 21.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
22. 22.⚡ What does a toaster mainly change electricity into? (a) sound (b) heat (c) light (d) movement
23. 23.Which of these mainly gives out heat? (a) an LED lamp (b) a rice cooker (c) a ceiling fan (d) a torch
24. 24.🔘 Which kind of switch stays where you flip it? (a) a tilt switch (b) a toggle switch (c) a reed switch (d) a push button
25. 25.Which of these means the circuit is closed? (a) the switch is ON (b) a cell is taken out (c) the bulb is unscrewed (d) a wire has come loose
26. 26.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) own switch for each bulb (d) bulbs share the voltage
27. 27.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
28. 28.True or false: a torch mainly makes movement. (a) True (b) False
29. 29.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
30. 30.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) photons (c) dust particles (d) water drops
31. 31.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
32. 32.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) motor (b) resistor (c) cell (d) battery
33. 33.💡 6 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
34. 34.Which of these is safe? (a) use a cable with cuts (b) keep drinks far away (c) poke things in a socket (d) open a phone charger
35. 35.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) an open circuit (c) a full circuit (d) a closed circuit
36. 36.Which drawing is the symbol for a cell? (a) a circle with V inside (b) two or more cell symbols (c) triangle, bar and arrows (d) a long and a short line
37. 37.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
38. 38.True or false: an electric drill mainly makes movement. (a) False (b) True
39. 39.🔋 How many 3 V cells must be joined in series to give 18 V?
40. 40.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True

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