Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 646 · 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 series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
2. 2.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
3. 3.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
4. 4.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a graphite rod. Does the bulb glow? (a) No (b) Yes
5. 5.Which of these is safe? (a) climb an electric pole (b) touch a switch when wet (c) use small battery cells (d) use mains for a project
6. 6.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
7. 7.Which of these is true of a series circuit? (a) one bulb out, all go out (b) each gets the full volts (c) one out, the rest glow (d) many paths for current
8. 8.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is ON and D is OFF. Does the bulb glow? (a) Yes (b) No
9. 9.Which of these is a conductor? (a) a paper strip (b) a ceramic cup (c) a wooden stick (d) a brass key
10. 10.Which of these is not safe? (a) build with an adult near (b) keep drinks far away (c) fly a kite near wires (d) stay away from pylons
11. 11.⚡ What does a water heater mainly change electricity into? (a) heat (b) movement (c) sound (d) light
12. 12.🔌 Is an iron nail a conductor or an insulator? (a) an insulator (b) a conductor
13. 13.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
14. 14.Which of these is an insulator? (a) a ceramic cup (b) a steel coin (c) a metal paper clip (d) an iron nail
15. 15.🔘 Which kind of switch springs back when let go? (a) a toggle switch (b) a reed switch (c) a tilt switch (d) a push button
16. 16.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
17. 17.Which drawing is the symbol for a resistor? (a) a plain rectangle (b) a circle with V inside (c) triangle against a bar (d) a circle with a cross
18. 18.True or false: to build with an adult near is safe. (a) False (b) True
19. 19.Which of these is safe? (a) stop if a part gets hot (b) use mains for a project (c) touch a switch when wet (d) poke things in a socket
20. 20.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) water drops (d) electrons
21. 21.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) give them for recycling (d) cut them open
22. 22.✏️ 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
23. 23.🔦 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
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) brighter (c) dimmer
25. 25.💡 3 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 1 and 3 are taken out of their holders. How many bulbs glow?
26. 26.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the bare end (c) the metal tip (d) the steel shaft
27. 27.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
28. 28.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a trusted adult (d) a stranger online
29. 29.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) one bulb out, all go out (d) one out, the rest glow
30. 30.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
31. 31.🔍 Which is the odd one out? (a) a steel spoon (b) an iron nail (c) a glass marble (d) a metal paper clip
32. 32.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
33. 33.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
34. 34.Which of these is true of a series circuit? (a) bulbs share the voltage (b) each gets the full volts (c) one out, the rest glow (d) many paths for current
35. 35.Which of these gives us electricity? (a) a generator (b) a washing machine (c) a water pump (d) a mobile phone
36. 36.Which of these means the circuit is open? (a) a wire is cut (b) the switch is ON (c) all wires are joined (d) the loop is complete
37. 37.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) the loop is complete (d) a wire is cut
38. 38.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
39. 39.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
40. 40.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True

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