Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 304 · 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 of these is an insulator? (a) a graphite rod (b) a plastic straw (c) a brass key (d) a safety pin
2. 2.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) battery (b) voltmeter (c) capacitor (d) diode
3. 3.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
4. 4.True or false: a table fan mainly gives out heat. (a) True (b) False
5. 5.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a long wire (c) a plug top (d) a fuse or MCB
6. 6.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) LED (b) battery (c) switch (d) capacitor
7. 7.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) a cell is taken out (d) the loop is complete
8. 8.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
9. 9.💡 3 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. Does bulb 1 glow? (a) Yes (b) No
10. 10.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
11. 11.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
12. 12.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
13. 13.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔘 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
15. 15.🔌 Most metals are good … (a) magnets only (b) conductors (c) insulators (d) batteries
16. 16.🔍 Which is the odd one out? (a) poke things in a socket (b) touch a fallen wire (c) climb an electric pole (d) stop if a part gets hot
17. 17.💡 2 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.⚡ What does an electric toy car mainly change electricity into? (a) light (b) heat (c) sound (d) movement
19. 19.⚠️ Which power source should children use for electronics projects? (a) a small battery pack (b) an inverter socket (c) a mains extension board (d) a wall socket
20. 20.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
22. 22.Which of these is safe? (a) climb an electric pole (b) use a cable with cuts (c) touch a switch when wet (d) use small battery cells
23. 23.Which of these mainly makes sound? (a) a tube light (b) an exhaust fan (c) a buzzer (d) an electric drill
24. 24.Which of these mainly makes movement? (a) an electric iron (b) a room heater (c) a doorbell (d) a ceiling fan
25. 25.🔗 Series or parallel circuit: “own switch for each bulb”? (a) parallel (b) series
26. 26.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) dry your hands first (d) use a cable with cuts
27. 27.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) nobody (c) a trusted adult (d) a younger child
28. 28.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) only when both are ON (c) never (d) when either is ON
29. 29.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
30. 30.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
31. 31.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) False (b) True
32. 32.Which of these uses electricity? (a) a washing machine (b) a bicycle dynamo (c) a cell (d) a solar panel
33. 33.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
34. 34.💡 A battery lights 5 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
35. 35.💡 A battery lights 3 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
36. 36.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) switch (c) ammeter (d) motor
37. 37.⚡ What does a ceiling fan mainly change electricity into? (a) light (b) movement (c) sound (d) heat
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) Yes (b) No
39. 39.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
40. 40.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator

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