Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 753 · 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. Does the bulb glow? (a) Yes (b) No
2. 2.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
3. 3.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
4. 4.True or false: a tilt switch closes near a magnet. (a) False (b) True
5. 5.True or false: a plastic straw is an insulator. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) a steel spoon (b) a dry cork (c) a plastic ruler (d) a cotton thread
7. 7.Which of these is safe? (a) open a phone charger (b) dry your hands first (c) touch a fallen wire (d) poke things in a socket
8. 8.Which of these gives us electricity? (a) a television (b) an air conditioner (c) a cell (d) a washing machine
9. 9.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic ruler (c) a metal paper clip (d) a paper strip
10. 10.Which of these is safe? (a) poke things in a socket (b) touch a switch when wet (c) use mains for a project (d) build with an adult near
11. 11.🔘 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?
12. 12.🔋 5 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
13. 13.🔍 Which is the odd one out? (a) a traffic signal (b) a toaster (c) an LED lamp (d) a night lamp
14. 14.💡 4 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. Does bulb 2 glow? (a) Yes (b) No
15. 15.Which of these is an insulator? (a) a wooden stick (b) a metal paper clip (c) a copper wire (d) a steel spoon
16. 16.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
17. 17.True or false: if a wire is cut, the circuit is open and no current flows. (a) True (b) False
18. 18.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) it is just untidy (c) water carries current (d) water makes it cold
19. 19.True or false: a rubber band is a conductor. (a) False (b) True
20. 20.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are ON (c) when either is ON (d) only when both are OFF
21. 21.Which of these mainly makes sound? (a) a room heater (b) a street light (c) a siren (d) an exhaust fan
22. 22.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the filament (d) the switch
23. 23.Which of these means the circuit is closed? (a) the switch is ON (b) the bulb is unscrewed (c) a wire is cut (d) a wire has come loose
24. 24.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
25. 25.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
26. 26.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
27. 27.🔦 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
28. 28.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
29. 29.🔘 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 OFF, C is ON and D is OFF. Does the bulb glow? (a) Yes (b) No
30. 30.💡 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
31. 31.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
32. 32.True or false: a slide switch slides side to side. (a) False (b) True
33. 33.Which of these mainly gives out light? (a) a toaster (b) a doorbell (c) a torch (d) a water heater
34. 34.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
35. 35.⚡ What does an electric iron mainly change electricity into? (a) light (b) movement (c) sound (d) heat
36. 36.Which of these mainly gives out light? (a) a water heater (b) a street light (c) an electric kettle (d) a room heater
37. 37.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a mains extension board (d) a wall socket
38. 38.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
39. 39.Which of these is a conductor? (a) a cotton thread (b) a glass marble (c) a copper wire (d) a rubber band
40. 40.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)

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