Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 468 · 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.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
2. 2.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
3. 3.🔘 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
4. 4.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
5. 5.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
6. 6.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
7. 7.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
8. 8.🔦 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
9. 9.Which of these mainly gives out light? (a) an electric iron (b) an exhaust fan (c) a torch (d) a mixer grinder
10. 10.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
11. 11.Which of these means the circuit is closed? (a) a wire has come loose (b) the bulb is unscrewed (c) the loop is complete (d) the switch is OFF
12. 12.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
13. 13.Which drawing is the symbol for a switch? (a) a long and a short line (b) a line lifted at a gap (c) triangle against a bar (d) triangle, bar and arrows
14. 14.Which of these is not safe? (a) take cells out after use (b) dry your hands first (c) keep drinks far away (d) poke things in a socket
15. 15.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
16. 16.💡 4 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. How many bulbs glow?
17. 17.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a short circuit (d) a safe circuit
18. 18.🔘 When a switch is ON, the circuit is … (a) closed (b) cut (c) broken (d) open
19. 19.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a toggle switch (c) a slide switch (d) a push button
20. 20.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
21. 21.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
22. 22.🔋 How many 2 V cells must be joined in series to give 8 V?
23. 23.⚡ What does a school bell mainly change electricity into? (a) heat (b) movement (c) sound (d) light
24. 24.Which of these gives us electricity? (a) a solar panel (b) an air conditioner (c) a computer (d) a mobile phone
25. 25.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 1 glow? (a) Yes (b) No
26. 26.Which of these is safe? (a) climb an electric pole (b) throw cells in a fire (c) use a cable with cuts (d) stop if a part gets hot
27. 27.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) a wire has come loose
28. 28.What does a push button do? (a) springs back when let go (b) stays where you flip it (c) closes near a magnet (d) flips up or down
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
30. 30.True or false: a water heater mainly gives out light. (a) False (b) True
31. 31.True or false: to use a cable with cuts is safe. (a) False (b) True
32. 32.⚡ What does a buzzer mainly change electricity into? (a) heat (b) sound (c) movement (d) light
33. 33.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
34. 34.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
35. 35.What does a toggle switch do? (a) works only while pressed (b) closes when tipped over (c) flips up or down (d) slides side to side
36. 36.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
37. 37.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
38. 38.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
39. 39.💡 A battery lights 2 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
40. 40.True or false: a loudspeaker mainly gives out heat. (a) True (b) False

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids