Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 503 · 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.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
2. 2.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 0.5 V (d) 230 V
3. 3.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
4. 4.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) one bulb out, all go out (d) used in house wiring
5. 5.True or false: a torch mainly gives out light. (a) False (b) True
6. 6.True or false: two or more cell symbols is the symbol for a battery. (a) True (b) False
7. 7.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
8. 8.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
9. 9.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
10. 10.What does a toggle switch do? (a) slides side to side (b) closes near a magnet (c) closes when tipped over (d) flips up or down
11. 11.Which drawing is the symbol for a motor? (a) a dot where wires meet (b) a circle with M inside (c) a circle with A inside (d) a small empty box
12. 12.🔋 What is a battery? (a) two or more cells joined (b) one single wire (c) a kind of bulb (d) a switch with a lid
13. 13.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) an electric drill (b) an LED lamp (c) an electric toy car (d) a mixer grinder
15. 15.🔍 Which is the odd one out? (a) a copper wire (b) an iron nail (c) a rubber eraser (d) a graphite rod
16. 16.🔋 6 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
17. 17.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a bulb (d) a plug top
18. 18.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is an insulator (d) plastic is a conductor
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) No (b) Yes
20. 20.What does a slide switch do? (a) slides side to side (b) stays where you flip it (c) springs back when let go (d) works only while pressed
21. 21.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
22. 22.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
23. 23.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a toggle switch (c) a slide switch (d) a push button
24. 24.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) the same voltage (d) double the voltage
25. 25.🔋 What should you do with used-up cells? (a) give them for recycling (b) throw them in a fire (c) cut them open (d) bury them in soil
26. 26.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
27. 27.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
28. 28.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
29. 29.🔍 Which is the odd one out? (a) use a cable with cuts (b) take cells out after use (c) build with an adult near (d) use small battery cells
30. 30.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a push button (c) a toggle switch (d) a tilt switch
31. 31.Which of these mainly gives out light? (a) a torch (b) a rice cooker (c) a buzzer (d) a table fan
32. 32.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the switch (c) the base (d) the glass
33. 33.⚡ What does a tube light mainly change electricity into? (a) light (b) movement (c) heat (d) sound
34. 34.True or false: a circle with a cross is the symbol for a diode. (a) False (b) True
35. 35.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
36. 36.True or false: to take cells out after use is safe. (a) False (b) True
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) No (b) Yes
38. 38.What does a reed switch do? (a) springs back when let go (b) closes near a magnet (c) stays where you flip it (d) works only while pressed
39. 39.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
40. 40.Which of these is true of a series circuit? (a) one out, the rest glow (b) many paths for current (c) each gets the full volts (d) a single current path

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