Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 826 · 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.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they keep glowing (d) they explode
2. 2.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) a single current path (d) one out, the rest glow
3. 3.True or false: a reed switch slides side to side. (a) True (b) False
4. 4.True or false: a ceramic cup is a conductor. (a) False (b) True
5. 5.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
6. 6.Which of these is not safe? (a) stay away from pylons (b) touch a fallen wire (c) build with an adult near (d) use small battery cells
7. 7.Which of these is not safe? (a) keep drinks far away (b) climb an electric pole (c) stay away from pylons (d) stop if a part gets hot
8. 8.Which of these uses electricity? (a) a cell (b) a battery (c) a washing machine (d) a wind turbine
9. 9.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
10. 10.🔦 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
11. 11.🔦 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
12. 12.💡 2 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 2 is taken out of its holder. How many bulbs glow?
13. 13.True or false: a small empty box is the symbol for a voltmeter. (a) False (b) True
14. 14.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) an electric toy car (b) an electric kettle (c) a water heater (d) a room heater
16. 16.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in parallel (d) in series
17. 17.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
18. 18.Which of these mainly gives out light? (a) a water heater (b) a mixer grinder (c) a doorbell (d) a night lamp
19. 19.Which drawing is the symbol for a switch? (a) a small empty box (b) a dot where wires meet (c) a long and a short line (d) a line lifted at a gap
20. 20.🔘 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
21. 21.🔋 5 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
22. 22.⚡ What does a toaster mainly change electricity into? (a) light (b) movement (c) heat (d) sound
23. 23.True or false: to dry your hands first is not safe. (a) True (b) False
24. 24.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
25. 25.🔍 Which is the odd one out? (a) a cotton thread (b) a copper wire (c) an iron nail (d) aluminium foil
26. 26.🔋 3 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)? =
27. 27.True or false: a tube light mainly makes movement. (a) False (b) True
28. 28.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
29. 29.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
30. 30.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is a conductor (d) plastic is an insulator
31. 31.True or false: a slide switch closes near a magnet. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a water heater (b) a table fan (c) an electric drill (d) a mixer grinder
33. 33.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
34. 34.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.True or false: a straight line is the symbol for a wire. (a) True (b) False
36. 36.🔘 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 ON, B is ON, C is ON and D is OFF. Does the bulb glow? (a) No (b) Yes
37. 37.True or false: a reed switch flips up or down. (a) False (b) True
38. 38.🔦 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 spoon. Does the bulb glow? (a) Yes (b) No
39. 39.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a room heater (b) a water heater (c) a siren (d) a rice cooker

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