Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 743 · 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.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
2. 2.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) wire (b) LED (c) junction (d) motor
3. 3.True or false: a loudspeaker mainly gives out light. (a) False (b) True
4. 4.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
5. 5.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
6. 6.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) switch (b) resistor (c) motor (d) cell
7. 7.🔘 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?
8. 8.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
9. 9.🔌 Most metals are good … (a) batteries (b) conductors (c) magnets only (d) insulators
10. 10.🔘 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
11. 11.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
12. 12.Which of these mainly makes sound? (a) an LED lamp (b) an electric drill (c) a room heater (d) a doorbell
13. 13.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
14. 14.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) a single current path (d) one out, the rest glow
15. 15.Which of these is true of a parallel circuit? (a) a single current path (b) used in house wiring (c) bulbs share the voltage (d) a break stops every bulb
16. 16.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
17. 17.🔍 Which is the odd one out? (a) touch a switch when wet (b) stop if a part gets hot (c) use small battery cells (d) fly kites in open fields
18. 18.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
19. 19.Which of these is safe? (a) open a phone charger (b) climb an electric pole (c) poke things in a socket (d) stay away from pylons
20. 20.What does a reed switch do? (a) closes near a magnet (b) slides side to side (c) flips up or down (d) stays where you flip it
21. 21.Which of these is a conductor? (a) a cotton thread (b) a ceramic cup (c) a metal paper clip (d) a wooden stick
22. 22.True or false: to keep drinks far away is safe. (a) False (b) True
23. 23.Which drawing is the symbol for a switch? (a) a circle with a cross (b) a line lifted at a gap (c) one tall, one short bar (d) a long and a short line
24. 24.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) cell (b) wire (c) resistor (d) LED
25. 25.Which drawing is the symbol for a wire? (a) a line lifted at a gap (b) a circle with an X in it (c) a straight line (d) a plain rectangle
26. 26.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) diode (b) resistor (c) wire (d) switch
27. 27.What does a tilt switch do? (a) flips up or down (b) closes when tipped over (c) works only while pressed (d) springs back when let go
28. 28.True or false: to keep drinks far away is not safe. (a) True (b) False
29. 29.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
30. 30.Which of these is an insulator? (a) a metal paper clip (b) a copper wire (c) a plastic ruler (d) a safety pin
31. 31.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
33. 33.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
34. 34.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
35. 35.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
36. 36.Which of these is a conductor? (a) a ceramic cup (b) a glass marble (c) a woollen thread (d) a graphite rod
37. 37.True or false: to take cells out after use is not safe. (a) False (b) True
38. 38.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
39. 39.Which of these mainly makes movement? (a) a school bell (b) a ceiling fan (c) a torch (d) a buzzer
40. 40.Which of these mainly makes sound? (a) a school bell (b) a water heater (c) an electric kettle (d) a mixer grinder

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