Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 58 · 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.🔍 Which is the odd one out? (a) an electric drill (b) a mixer grinder (c) a doorbell (d) an electric toy car
2. 2.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
3. 3.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
4. 4.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
5. 5.Which of these is safe? (a) climb an electric pole (b) use a cable with cuts (c) use small battery cells (d) touch a switch when wet
6. 6.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a push button (c) a reed switch (d) a slide switch
7. 7.🔘 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?
8. 8.💡 2 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
9. 9.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
10. 10.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) aluminium foil (b) a steel spoon (c) an iron nail (d) a wooden stick
12. 12.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) a small battery pack (d) an inverter socket
13. 13.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a short circuit (c) a parallel circuit (d) a safe circuit
14. 14.🔍 Which is the odd one out? (a) a siren (b) a school bell (c) a loudspeaker (d) a toaster
15. 15.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
16. 16.⚡ What does a siren mainly change electricity into? (a) sound (b) light (c) movement (d) heat
17. 17.Which of these gives us electricity? (a) a power station (b) a water pump (c) a television (d) a washing machine
18. 18.🔍 Which is the odd one out? (a) a glass marble (b) a ceramic cup (c) an iron nail (d) a dry cork
19. 19.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) sound energy (d) movement energy
20. 20.⚡ What does a mixer grinder mainly change electricity into? (a) light (b) heat (c) sound (d) movement
21. 21.True or false: two equal parallel lines is the symbol for a capacitor. (a) False (b) True
22. 22.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
23. 23.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) one out, the rest glow (d) a single current path
24. 24.Which of these means the circuit is closed? (a) the switch is ON (b) a wire is cut (c) a cell is taken out (d) the bulb is unscrewed
25. 25.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
26. 26.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) give them for recycling (d) cut them open
27. 27.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
28. 28.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) resistor (c) cell (d) battery
29. 29.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
30. 30.🔍 Which is the odd one out? (a) a graphite rod (b) a steel spoon (c) an iron nail (d) a plastic ruler
31. 31.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
32. 32.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
33. 33.Which of these is a conductor? (a) a woollen thread (b) a brass key (c) a rubber eraser (d) a plastic ruler
34. 34.Which of these mainly gives out heat? (a) an electric toy car (b) an electric kettle (c) a doorbell (d) an electric drill
35. 35.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) bulb (c) diode (d) ammeter
36. 36.🔋 5 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)? =
37. 37.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.🔍 Which is the odd one out? (a) an electric drill (b) a traffic signal (c) a table fan (d) an electric toy car
39. 39.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
40. 40.💡 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

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