Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 559 · 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.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
2. 2.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) cell (b) bulb (c) battery (d) motor
3. 3.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
4. 4.🔋 How many 1.5 V cells must be joined in series to give 3 V?
5. 5.🔍 Which is the odd one out? (a) keep drinks far away (b) build with an adult near (c) stay away from pylons (d) touch a switch when wet
6. 6.True or false: a slide switch closes when tipped over. (a) False (b) True
7. 7.💡 A battery lights 3 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
8. 8.True or false: to throw cells in a fire is not safe. (a) False (b) True
9. 9.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
10. 10.🔍 Which is the odd one out? (a) dry your hands first (b) build with an adult near (c) use mains for a project (d) take cells out after use
11. 11.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a push button (c) a tilt switch (d) a slide switch
12. 12.True or false: a push button closes when tipped over. (a) False (b) True
13. 13.Which of these mainly gives out light? (a) a mixer grinder (b) a ceiling fan (c) a table fan (d) a traffic signal
14. 14.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
15. 15.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) when either is ON (c) only when both are ON (d) only when both are OFF
16. 16.Which of these mainly gives out heat? (a) a siren (b) a ceiling fan (c) a table fan (d) an electric iron
17. 17.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
18. 18.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) use a cable with cuts (b) use mains for a project (c) dry your hands first (d) poke things in a socket
20. 20.True or false: many long-short pairs is the symbol for a resistor. (a) True (b) False
21. 21.🔋 6 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)? =
22. 22.💡 6 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?
23. 23.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
24. 24.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a copper wire (d) a plastic straw
25. 25.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
26. 26.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
27. 27.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
28. 28.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
29. 29.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
30. 30.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
31. 31.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
32. 32.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.True or false: a straight line is the symbol for a wire. (a) True (b) False
34. 34.Which of these is an insulator? (a) a copper wire (b) a cotton thread (c) a safety pin (d) a steel spoon
35. 35.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) it does not matter (d) both of them
36. 36.Which of these means the circuit is closed? (a) a cell is taken out (b) all wires are joined (c) a wire has come loose (d) a wire is cut
37. 37.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
38. 38.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) movement (c) light (d) heat
39. 39.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
40. 40.True or false: a circle with M inside is the symbol for a cell. (a) True (b) False

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