Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 216 · 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.Which of these mainly makes sound? (a) a loudspeaker (b) an electric toy car (c) a rice cooker (d) an LED lamp
2. 2.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
3. 3.True or false: a mixer grinder mainly gives out light. (a) True (b) False
4. 4.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
5. 5.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) nobody (c) a younger child (d) a stranger online
6. 6.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
7. 7.What does a slide switch do? (a) closes when tipped over (b) works only while pressed (c) closes near a magnet (d) slides side to side
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
9. 9.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
10. 10.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
11. 11.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
12. 12.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
13. 13.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 230 V (c) 0.5 V (d) 15 V
14. 14.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
15. 15.Which of these mainly gives out heat? (a) an electric kettle (b) a doorbell (c) an exhaust fan (d) a night lamp
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
17. 17.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) a break stops every bulb (d) used in house wiring
18. 18.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) resistor (b) switch (c) ammeter (d) cell
19. 19.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
20. 20.True or false: a steel spoon is a conductor. (a) False (b) True
21. 21.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
22. 22.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) a small battery pack (d) an inverter socket
23. 23.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
24. 24.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) none (d) two
25. 25.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
27. 27.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) light energy (c) movement energy (d) chemical energy
28. 28.Which drawing is the symbol for a wire? (a) two or more cell symbols (b) many long-short pairs (c) one tall, one short bar (d) a straight line
29. 29.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
30. 30.What does a toggle switch do? (a) flips up or down (b) works only while pressed (c) slides side to side (d) closes when tipped over
31. 31.Which of these mainly gives out heat? (a) an electric toy car (b) a street light (c) a mixer grinder (d) an electric iron
32. 32.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
33. 33.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
34. 34.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
35. 35.Which of these is safe? (a) use small battery cells (b) throw cells in a fire (c) use a cable with cuts (d) poke things in a socket
36. 36.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
37. 37.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
38. 38.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
39. 39.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
40. 40.💡 6 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =

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