Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 915 · 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 must there be for a current to flow? (a) one loose end (b) a complete loop (c) a plastic gap (d) a broken path
2. 2.True or false: to keep drinks far away is not safe. (a) False (b) True
3. 3.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
4. 4.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
5. 5.Which of these mainly makes movement? (a) a doorbell (b) a mixer grinder (c) a rice cooker (d) an LED lamp
6. 6.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
7. 7.True or false: to use mains for a project is not safe. (a) False (b) True
8. 8.🔘 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 OFF, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
9. 9.⚡ What does a mixer grinder mainly change electricity into? (a) sound (b) light (c) movement (d) heat
10. 10.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
11. 11.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) symbols are heavier (d) to hide the circuit
12. 12.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
13. 13.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) none (c) only one (d) it does not matter
15. 15.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a slide switch
16. 16.True or false: to touch a switch when wet is not safe. (a) True (b) False
17. 17.Which drawing is the symbol for a battery? (a) a circle with an X in it (b) a circle with a cross (c) two or more cell symbols (d) a small empty box
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
19. 19.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a push button (c) a toggle switch (d) a slide switch
20. 20.🔍 Which is the odd one out? (a) a torch (b) a traffic signal (c) an electric toy car (d) an LED lamp
21. 21.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.True or false: to use small battery cells is safe. (a) False (b) True
23. 23.True or false: a push button springs back when let go. (a) False (b) True
24. 24.🔦 A circuit has a used-up (dead) 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 steel coin. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
26. 26.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
27. 27.🔍 Which is the odd one out? (a) stay away from pylons (b) touch a switch when wet (c) take cells out after use (d) dry your hands first
28. 28.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
29. 29.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
30. 30.Which of these mainly gives out heat? (a) an exhaust fan (b) an electric kettle (c) a school bell (d) a night lamp
31. 31.True or false: to climb an electric pole is not safe. (a) False (b) True
32. 32.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
33. 33.Which drawing is the symbol for a diode? (a) a straight line (b) a circle with a cross (c) triangle, bar and arrows (d) triangle against a bar
34. 34.True or false: a reed switch closes near a magnet. (a) True (b) False
35. 35.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
36. 36.What does a tilt switch do? (a) works only while pressed (b) closes when tipped over (c) springs back when let go (d) stays where you flip it
37. 37.⚡ What does a room heater mainly change electricity into? (a) movement (b) light (c) sound (d) heat
38. 38.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) a traffic signal (b) a siren (c) a school bell (d) a buzzer
40. 40.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open

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