Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 334 · 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.⚡ What does a loudspeaker mainly change electricity into? (a) light (b) movement (c) sound (d) heat
2. 2.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
3. 3.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
4. 4.True or false: a doorbell mainly makes movement. (a) True (b) False
5. 5.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
6. 6.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) sound (d) friction
7. 7.Which of these gives us electricity? (a) an air conditioner (b) a computer (c) a water pump (d) a solar panel
8. 8.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a parallel circuit (c) an open circuit (d) a short circuit
9. 9.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
10. 10.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 1.5 V (d) 15 V
11. 11.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) two or more cells joined (d) a kind of bulb
12. 12.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
13. 13.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) a wire is cut (d) all wires are joined
14. 14.Which of these is true of a series circuit? (a) a single current path (b) one out, the rest glow (c) own switch for each bulb (d) many paths for current
15. 15.🔋 5 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
16. 16.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
17. 17.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
18. 18.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
19. 19.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) own switch for each bulb (c) one bulb out, all go out (d) a single current path
20. 20.🔋 How many 1.2 V cells must be joined in series to give 6 V?
21. 21.🔌 Most metals are good … (a) insulators (b) magnets only (c) conductors (d) batteries
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) No (b) Yes
23. 23.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are OFF (c) when both are ON (d) never
24. 24.🔦 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 brass key. Does the bulb glow? (a) No (b) Yes
25. 25.True or false: to poke things in a socket is safe. (a) False (b) True
26. 26.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) an inverter socket (d) a small battery pack
27. 27.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
28. 28.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a stranger online (d) a trusted adult
29. 29.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
30. 30.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
31. 31.Which of these is a conductor? (a) a ceramic cup (b) a wooden stick (c) a rubber eraser (d) a steel spoon
32. 32.🔘 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 OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
33. 33.True or false: a plastic straw is a conductor. (a) True (b) False
34. 34.Which of these mainly makes sound? (a) a mixer grinder (b) a room heater (c) an electric kettle (d) a school bell
35. 35.🔘 A bulb and a cell are joined through 6 switches on 6 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 the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
37. 37.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
38. 38.True or false: to use a cable with cuts is safe. (a) True (b) False
39. 39.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series

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