Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 297 · 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.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
2. 2.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a push button (c) a slide switch (d) a tilt switch
3. 3.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
4. 4.True or false: to fly kites in open fields is safe. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) touch a switch when wet (b) use small battery cells (c) open a phone charger (d) use a cable with cuts
6. 6.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
7. 7.🔋 How many 2 V cells must be joined in series to give 16 V?
8. 8.⚡ What does an exhaust fan mainly change electricity into? (a) sound (b) movement (c) light (d) heat
9. 9.Which of these is an insulator? (a) a rubber band (b) a copper wire (c) a graphite rod (d) a steel spoon
10. 10.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) throw cells in a fire (b) use mains for a project (c) use a cable with cuts (d) fly kites in open fields
12. 12.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
13. 13.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) a cell is taken out (d) the switch is ON
14. 14.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when both are ON (d) when either is ON
15. 15.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
16. 16.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
17. 17.⚡ What does a buzzer mainly change electricity into? (a) heat (b) light (c) movement (d) sound
18. 18.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a reed switch (c) a toggle switch (d) a tilt switch
19. 19.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) stop if a part gets hot (b) dry your hands first (c) touch a switch when wet (d) stay away from pylons
21. 21.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
22. 22.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
23. 23.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) two or more cell symbols (c) a circle with an X in it (d) triangle against a bar
24. 24.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
25. 25.True or false: to touch a switch when wet is safe. (a) False (b) True
26. 26.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) the switch is OFF
27. 27.🔍 Which is the odd one out? (a) dry your hands first (b) climb an electric pole (c) stop if a part gets hot (d) keep drinks far away
28. 28.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
29. 29.🔋 How many 2 V cells must be joined in series to give 10 V?
30. 30.True or false: to use mains for a project is safe. (a) False (b) True
31. 31.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.Which of these is safe? (a) poke things in a socket (b) touch a fallen wire (c) dry your hands first (d) fly a kite near wires
33. 33.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
34. 34.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
35. 35.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) one out, the rest glow (d) a break stops every bulb
36. 36.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
37. 37.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
38. 38.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
39. 39.💡 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 3 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
40. 40.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) not joined (d) in series

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