Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 999 · 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.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
2. 2.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
3. 3.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) diode (c) switch (d) voltmeter
4. 4.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
5. 5.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
6. 6.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
7. 7.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) No (b) Yes
8. 8.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) a break stops every bulb (d) bulbs share the voltage
9. 9.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
10. 10.What does a tilt switch do? (a) stays where you flip it (b) works only while pressed (c) closes when tipped over (d) closes near a magnet
11. 11.True or false: a ceiling fan mainly makes movement. (a) True (b) False
12. 12.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
13. 13.🔍 Which is the odd one out? (a) fly a kite near wires (b) touch a fallen wire (c) throw cells in a fire (d) keep drinks far away
14. 14.🔘 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 OFF and D is ON. Does the bulb glow? (a) No (b) Yes
15. 15.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
16. 16.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
17. 17.True or false: a slide switch closes near a magnet. (a) False (b) True
18. 18.🔋 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)? =
19. 19.True or false: a cotton thread is a conductor. (a) True (b) False
20. 20.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) by Wi-Fi (d) not joined
21. 21.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) it is just untidy (c) water makes it cold (d) water carries current
22. 22.💡 A battery lights 2 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
23. 23.💡 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?
24. 24.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
25. 25.🔍 Which is the odd one out? (a) a steel spoon (b) a ceramic cup (c) a dry cork (d) a rubber eraser
26. 26.True or false: a steel spoon is an insulator. (a) False (b) True
27. 27.🔘 Which kind of switch springs back when let go? (a) a push button (b) a slide switch (c) a reed switch (d) a tilt switch
28. 28.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
29. 29.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
30. 30.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) wavy lines (d) straight lines
31. 31.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) bulb (b) LED (c) diode (d) cell
32. 32.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) neither line (d) both lines
33. 33.🔁 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
34. 34.🔍 Which is the odd one out? (a) a rubber eraser (b) a paper strip (c) a graphite rod (d) a ceramic cup
35. 35.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
36. 36.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) an open circuit (c) a parallel circuit (d) a short circuit
37. 37.True or false: to climb an electric pole is not safe. (a) True (b) False
38. 38.💡 6 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. Bulb 3 is taken out of its holder. How many bulbs glow?
39. 39.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) none (d) two
40. 40.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) wind energy (c) light energy (d) chemical energy

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