Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 514 · 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.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
2. 2.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
3. 3.True or false: “a single current path” is true of a series circuit. (a) True (b) False
4. 4.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
5. 5.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
6. 6.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
7. 7.Which of these gives us electricity? (a) a mobile phone (b) a refrigerator (c) a water pump (d) a cell
8. 8.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
10. 10.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) ammeter (b) resistor (c) switch (d) diode
11. 11.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a copper wire. Does the bulb glow? (a) Yes (b) No
12. 12.🔍 Which is the odd one out? (a) a steel coin (b) a metal paper clip (c) a graphite rod (d) a plastic straw
13. 13.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
14. 14.🔦 A circuit has a new 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 metal paper clip. Does the bulb glow? (a) Yes (b) No
15. 15.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a steel spoon. Does the bulb glow? (a) No (b) Yes
16. 16.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) nobody (c) a trusted adult (d) a stranger online
17. 17.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when either is ON (d) when both are ON
18. 18.🔋 5 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
20. 20.🔍 Which is the odd one out? (a) a school bell (b) a buzzer (c) an exhaust fan (d) a siren
21. 21.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a small battery pack (d) a mains extension board
22. 22.🔘 Which kind of switch works only while pressed? (a) a push button (b) a slide switch (c) a toggle switch (d) a tilt switch
23. 23.🔍 Which is the odd one out? (a) a rubber eraser (b) a paper strip (c) a ceramic cup (d) aluminium foil
24. 24.True or false: many long-short pairs is the symbol for a cell. (a) True (b) False
25. 25.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a toggle switch (c) a slide switch (d) a tilt switch
26. 26.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the bare end (c) the plastic handle (d) the metal tip
27. 27.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to hide the circuit (d) to make it colourful
28. 28.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
29. 29.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
30. 30.True or false: to stop if a part gets hot is not safe. (a) True (b) False
31. 31.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 9 V (d) 230 V
32. 32.True or false: a dry cork is an insulator. (a) False (b) True
33. 33.🔦 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
34. 34.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) one single wire (d) a switch with a lid
35. 35.True or false: a rubber eraser is a conductor. (a) False (b) True
36. 36.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
37. 37.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
38. 38.💡 2 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
39. 39.🔋 5 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
40. 40.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) a closed circuit (d) an open circuit

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