Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 144 · 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.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
2. 2.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
3. 3.What does a push button do? (a) works only while pressed (b) flips up or down (c) stays where you flip it (d) slides side to side
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
5. 5.True or false: a loudspeaker mainly makes movement. (a) True (b) False
6. 6.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) quick and clear for all (c) to make it colourful (d) symbols are heavier
7. 7.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
8. 8.Which of these is true of a series circuit? (a) a single current path (b) one out, the rest glow (c) many paths for current (d) used in house wiring
9. 9.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a series circuit (d) a closed circuit
10. 10.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
11. 11.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
12. 12.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
13. 13.True or false: a night lamp mainly gives out light. (a) True (b) False
14. 14.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) a circle with an X in it (c) a circle with V inside (d) two or more cell symbols
15. 15.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
16. 16.True or false: a plastic straw is an insulator. (a) False (b) True
17. 17.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 1.5 V (d) 230 V
18. 18.True or false: to touch a fallen wire is safe. (a) False (b) True
19. 19.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
20. 20.⚡ What does a table fan mainly change electricity into? (a) movement (b) light (c) heat (d) sound
21. 21.What does a tilt switch do? (a) slides side to side (b) stays where you flip it (c) springs back when let go (d) closes when tipped over
22. 22.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a reed switch (c) a push button (d) a tilt switch
23. 23.True or false: a glass marble is a conductor. (a) False (b) True
24. 24.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
25. 25.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) cell (b) battery (c) ammeter (d) junction
26. 26.Which of these is safe? (a) fly a kite near wires (b) throw cells in a fire (c) use mains for a project (d) build with an adult near
27. 27.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
28. 28.What does a slide switch do? (a) flips up or down (b) works only while pressed (c) slides side to side (d) springs back when let go
29. 29.🔘 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 ON. Does the bulb glow? (a) Yes (b) No
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) Yes (b) No
31. 31.True or false: “a single current path” is true of a series circuit. (a) True (b) False
32. 32.🔌 Most metals are good … (a) magnets only (b) batteries (c) insulators (d) conductors
33. 33.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
34. 34.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
35. 35.Which of these mainly makes movement? (a) a water heater (b) a buzzer (c) a doorbell (d) an electric drill
36. 36.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.🔦 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 ceramic cup. Does the bulb glow? (a) No (b) Yes
38. 38.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the glass (c) the switch (d) the filament
39. 39.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
40. 40.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) both of them (d) none

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