Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 35 · 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 is the odd one out? (a) a brass key (b) a plastic ruler (c) a paper strip (d) a cotton thread
2. 2.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it spoils the paint (c) it is just untidy (d) water makes it cold
3. 3.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
4. 4.🔘 Which kind of switch slides side to side? (a) a push button (b) a tilt switch (c) a reed switch (d) a slide switch
5. 5.True or false: “a single current path” is true of a series circuit. (a) False (b) True
6. 6.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a cell (c) an insulator (d) a switch that is ON
7. 7.Which of these is a conductor? (a) a plastic straw (b) a rubber band (c) a steel coin (d) a plastic ruler
8. 8.🔋 2 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)? =
9. 9.Which drawing is the symbol for a cell? (a) a small empty box (b) a circle with A inside (c) triangle against a bar (d) a long and a short line
10. 10.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 230 V (d) 1.5 V
11. 11.Which of these is true of a series circuit? (a) each gets the full volts (b) bulbs share the voltage (c) own switch for each bulb (d) one out, the rest glow
12. 12.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
13. 13.Which of these is safe? (a) throw cells in a fire (b) climb an electric pole (c) open a phone charger (d) fly kites in open fields
14. 14.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they get dimmer (d) they keep glowing
15. 15.Which of these is a conductor? (a) a wooden stick (b) a paper strip (c) a rubber eraser (d) a graphite rod
16. 16.What does a tilt switch do? (a) slides side to side (b) closes when tipped over (c) stays where you flip it (d) closes near a magnet
17. 17.🔍 Which is the odd one out? (a) poke things in a socket (b) use small battery cells (c) stop if a part gets hot (d) build with an adult near
18. 18.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
19. 19.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
20. 20.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
21. 21.Which of these is safe? (a) climb an electric pole (b) use a cable with cuts (c) touch a switch when wet (d) take cells out after use
22. 22.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
23. 23.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
24. 24.Which of these gives us electricity? (a) a cell (b) a computer (c) a mobile phone (d) an air conditioner
25. 25.Which drawing is the symbol for a capacitor? (a) a circle with A inside (b) a line lifted at a gap (c) a plain rectangle (d) two equal parallel lines
26. 26.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
27. 27.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is OFF (d) the switch is ON
28. 28.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) switch (b) LED (c) battery (d) junction
29. 29.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) a wire has come loose (d) the loop is complete
30. 30.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
31. 31.Which of these gives us electricity? (a) an air conditioner (b) a solar panel (c) a computer (d) a water pump
32. 32.Which of these is a conductor? (a) a metal paper clip (b) a glass marble (c) a wooden stick (d) a paper strip
33. 33.True or false: to build with an adult near is safe. (a) True (b) False
34. 34.💡 5 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?
35. 35.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
36. 36.Which of these is not safe? (a) use small battery cells (b) stop if a part gets hot (c) keep drinks far away (d) use a cable with cuts
37. 37.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a kind of bulb (d) a switch with a lid
38. 38.Which drawing is the symbol for a resistor? (a) many long-short pairs (b) one tall, one short bar (c) a plain rectangle (d) a circle with a cross
39. 39.Which of these uses electricity? (a) a power station (b) a battery (c) a television (d) a cell
40. 40.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False

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