Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 845 · 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.True or false: a ceiling fan mainly makes movement. (a) False (b) True
2. 2.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
3. 3.Which of these is true of a series circuit? (a) a single current path (b) own switch for each bulb (c) one out, the rest glow (d) each gets the full volts
4. 4.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
5. 5.🔍 Which is the odd one out? (a) throw cells in a fire (b) touch a fallen wire (c) use small battery cells (d) use mains for a project
6. 6.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) two (d) one
7. 7.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
8. 8.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
9. 9.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
10. 10.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
11. 11.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 15 V (c) 0.5 V (d) 1.5 V
12. 12.🔋 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
13. 13.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
14. 14.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
15. 15.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
16. 16.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
17. 17.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
19. 19.🔍 Which is the odd one out? (a) an electric iron (b) a water heater (c) an exhaust fan (d) a toaster
20. 20.🔋 5 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
21. 21.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
22. 22.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a rubber eraser. Does the bulb glow? (a) Yes (b) No
23. 23.💡 3 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. Does bulb 1 glow? (a) Yes (b) No
24. 24.Which of these is not safe? (a) climb an electric pole (b) fly kites in open fields (c) dry your hands first (d) keep drinks far away
25. 25.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
26. 26.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) both lines (d) neither line
27. 27.True or false: to poke things in a socket is not safe. (a) False (b) True
28. 28.Which of these is a conductor? (a) a glass marble (b) a cotton thread (c) a plastic straw (d) a steel coin
29. 29.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) ammeter (b) voltmeter (c) capacitor (d) wire
30. 30.💡 2 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 2 is taken out of its holder. How many bulbs glow?
31. 31.Which of these gives us electricity? (a) a water pump (b) a mobile phone (c) a computer (d) a cell
32. 32.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
33. 33.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
34. 34.True or false: a circle with an X in it is the symbol for a resistor. (a) False (b) True
35. 35.Which drawing is the symbol for a switch? (a) a circle with V inside (b) triangle, bar and arrows (c) a line lifted at a gap (d) many long-short pairs
36. 36.Which of these gives us electricity? (a) a water pump (b) a mobile phone (c) an air conditioner (d) a solar panel
37. 37.True or false: a brass key is an insulator. (a) True (b) False
38. 38.Which of these is a conductor? (a) a cotton thread (b) a plastic ruler (c) aluminium foil (d) a wooden stick
39. 39.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) dotted circles (c) little stars (d) straight lines
40. 40.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) switch (b) bulb (c) junction (d) resistor

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