Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 680 · 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 of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) each gets the full volts (d) a break stops every bulb
2. 2.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
3. 3.🔘 Which kind of switch works only while pressed? (a) a tilt switch (b) a reed switch (c) a toggle switch (d) a push button
4. 4.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
5. 5.True or false: to use small battery cells is safe. (a) False (b) True
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) both of them (c) it does not matter (d) none
7. 7.True or false: a tube light mainly makes movement. (a) True (b) False
8. 8.🔋 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)? =
9. 9.True or false: a metal paper clip is an insulator. (a) True (b) False
10. 10.⚠️ Is it safe to keep drinks far away? (a) not safe (b) safe
11. 11.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
12. 12.🔦 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
13. 13.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
14. 14.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) in parallel (d) by Wi-Fi
15. 15.Which of these is safe? (a) touch a fallen wire (b) fly a kite near wires (c) touch a switch when wet (d) build with an adult near
16. 16.Which of these is a conductor? (a) a plastic straw (b) a rubber eraser (c) a steel coin (d) a ceramic cup
17. 17.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
18. 18.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) switch (b) battery (c) diode (d) motor
20. 20.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a mains extension board (c) a small battery pack (d) a wall socket
21. 21.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
22. 22.💡 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. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
23. 23.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) wire (b) switch (c) bulb (d) battery
25. 25.True or false: one tall, one short bar is the symbol for a capacitor. (a) True (b) False
26. 26.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) ammeter (b) switch (c) battery (d) LED
27. 27.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
28. 28.Which drawing is the symbol for a junction? (a) two equal parallel lines (b) a dot where wires meet (c) a small empty box (d) a line lifted at a gap
29. 29.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
30. 30.True or false: a toggle switch closes when tipped over. (a) True (b) False
31. 31.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a safe circuit (d) a short circuit
32. 32.💡 4 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 3 and 4 are taken out of their holders. How many bulbs glow?
33. 33.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
34. 34.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a glass marble (d) an iron nail
35. 35.🔘 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?
36. 36.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.Which of these is an insulator? (a) aluminium foil (b) a brass key (c) a wooden stick (d) a steel spoon
38. 38.⚡ What does a torch mainly change electricity into? (a) heat (b) movement (c) light (d) sound
39. 39.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
40. 40.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True

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