Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 714 · 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 it safe to stay away from pylons? (a) not safe (b) safe
2. 2.🔍 Which is the odd one out? (a) a safety pin (b) a plastic straw (c) aluminium foil (d) an iron nail
3. 3.🔍 Which is the odd one out? (a) touch a switch when wet (b) keep drinks far away (c) use small battery cells (d) stop if a part gets hot
4. 4.True or false: a dry cork is a conductor. (a) True (b) False
5. 5.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
6. 6.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a tilt switch (c) a reed switch (d) a push button
7. 7.🔦 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 wooden stick. Does the bulb glow? (a) No (b) Yes
8. 8.✏️ 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
9. 9.💡 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) Yes (b) No
10. 10.True or false: to stop if a part gets hot is safe. (a) True (b) False
11. 11.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
12. 12.🔍 Which is the odd one out? (a) touch a fallen wire (b) use a cable with cuts (c) climb an electric pole (d) take cells out after use
13. 13.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
15. 15.Which of these mainly gives out light? (a) a room heater (b) a mixer grinder (c) an LED lamp (d) a toaster
16. 16.🔍 Which is the odd one out? (a) throw cells in a fire (b) dry your hands first (c) keep drinks far away (d) take cells out after use
17. 17.Which of these is not safe? (a) build with an adult near (b) keep drinks far away (c) touch a fallen wire (d) fly kites in open fields
18. 18.Which of these is safe? (a) fly a kite near wires (b) keep drinks far away (c) poke things in a socket (d) throw cells in a fire
19. 19.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a younger child (c) a trusted adult (d) nobody
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
21. 21.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
22. 22.Which of these is a conductor? (a) a cotton thread (b) a paper strip (c) a rubber band (d) an iron nail
23. 23.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
24. 24.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
25. 25.🔍 Which is the odd one out? (a) a doorbell (b) a loudspeaker (c) a siren (d) an exhaust fan
26. 26.Which of these is safe? (a) dry your hands first (b) open a phone charger (c) use mains for a project (d) use a cable with cuts
27. 27.True or false: a woollen thread is an insulator. (a) False (b) True
28. 28.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
29. 29.Which of these mainly gives out light? (a) a mixer grinder (b) a torch (c) an electric toy car (d) a table fan
30. 30.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
31. 31.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a closed circuit (c) a full circuit (d) an open circuit
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) straight lines (d) little stars
34. 34.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
35. 35.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a plastic gap (d) a complete loop
36. 36.Which of these is true of a series circuit? (a) used in house wiring (b) each gets the full volts (c) one out, the rest glow (d) a single current path
37. 37.🔋 5 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
38. 38.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. 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
39. 39.True or false: to use a cable with cuts is not safe. (a) False (b) True
40. 40.Which of these uses electricity? (a) a generator (b) a television (c) a wind turbine (d) a solar panel

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