Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 301 · 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) none (c) one for each bulb (d) one
2. 2.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) used in house wiring (d) bulbs share the voltage
3. 3.Which of these gives us electricity? (a) a television (b) a computer (c) a power station (d) a water pump
4. 4.💡 3 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
5. 5.💡 5 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 4 are taken out of their holders. How many bulbs glow?
6. 6.True or false: a ceiling fan mainly makes movement. (a) True (b) False
7. 7.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) water carries current (c) it spoils the paint (d) water makes it cold
10. 10.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
11. 11.🔍 Which is the odd one out? (a) take cells out after use (b) keep drinks far away (c) poke things in a socket (d) stay away from pylons
12. 12.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) bulb (c) ammeter (d) capacitor
13. 13.True or false: a reed switch closes near a magnet. (a) True (b) False
14. 14.True or false: a push button springs back when let go. (a) True (b) False
15. 15.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
16. 16.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) half the voltage (c) the same voltage (d) double the voltage
17. 17.True or false: a tube light mainly gives out heat. (a) False (b) True
18. 18.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
19. 19.Which of these mainly gives out heat? (a) an electric kettle (b) a siren (c) a doorbell (d) a traffic signal
20. 20.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
21. 21.True or false: a circle with M inside is the symbol for a voltmeter. (a) True (b) False
22. 22.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) in series (d) by Wi-Fi
23. 23.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
24. 24.🔋 How many 3 V cells must be joined in series to give 9 V?
25. 25.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a slide switch
26. 26.🔋 What should you do with used-up cells? (a) cut them open (b) bury them in soil (c) give them for recycling (d) throw them in a fire
27. 27.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
29. 29.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
30. 30.⚡ What does an electric kettle mainly change electricity into? (a) sound (b) movement (c) light (d) heat
31. 31.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) battery (b) ammeter (c) voltmeter (d) wire
32. 32.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
33. 33.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
34. 34.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
35. 35.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
36. 36.True or false: “a single current path” is true of a series circuit. (a) False (b) True
37. 37.Which drawing is the symbol for a capacitor? (a) a circle with A inside (b) two equal parallel lines (c) a circle with V inside (d) a line lifted at a gap
38. 38.Which of these is safe? (a) throw cells in a fire (b) use mains for a project (c) build with an adult near (d) touch a switch when wet
39. 39.🔘 A bulb and a cell are joined through 3 switches on 3 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?
40. 40.True or false: a safety pin is a conductor. (a) False (b) True

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