Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 900 · 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.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) a bigger voltage (d) the same voltage
2. 2.🔍 Which is the odd one out? (a) stop if a part gets hot (b) stay away from pylons (c) fly a kite near wires (d) dry your hands first
3. 3.🔍 Which is the odd one out? (a) keep drinks far away (b) fly a kite near wires (c) open a phone charger (d) use a cable with cuts
4. 4.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) the switch is OFF (d) all wires are joined
5. 5.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) not joined (d) by Wi-Fi
6. 6.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
7. 7.Which drawing is the symbol for a battery? (a) a small empty box (b) a long and a short line (c) two or more cell symbols (d) a circle with an X in it
8. 8.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
9. 9.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
11. 11.True or false: to build with an adult near is not safe. (a) True (b) False
12. 12.🔘 Which kind of switch slides side to side? (a) a push button (b) a toggle switch (c) a slide switch (d) a tilt switch
13. 13.🔘 When a switch is ON, the circuit is … (a) cut (b) open (c) closed (d) broken
14. 14.Which of these uses electricity? (a) a wind turbine (b) a power station (c) a solar panel (d) a computer
15. 15.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
16. 16.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
17. 17.Which of these is a conductor? (a) a glass marble (b) a dry cork (c) a steel spoon (d) a ceramic cup
18. 18.🔌 Is a cotton thread a conductor or an insulator? (a) an insulator (b) a conductor
19. 19.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
20. 20.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
21. 21.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) LED (b) switch (c) resistor (d) diode
22. 22.🔋 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)? =
23. 23.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
24. 24.Which of these is true of a series circuit? (a) bulbs share the voltage (b) one out, the rest glow (c) many paths for current (d) own switch for each bulb
25. 25.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) each gets the full volts (c) bulbs share the voltage (d) one bulb out, all go out
26. 26.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. How many bulbs glow?
27. 27.🔦 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 rubber eraser. Does the bulb glow? (a) Yes (b) No
28. 28.True or false: to use small battery cells is safe. (a) True (b) False
29. 29.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) diode (b) ammeter (c) voltmeter (d) resistor
30. 30.🔍 Which is the odd one out? (a) a traffic signal (b) a tube light (c) a room heater (d) an LED lamp
31. 31.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) many paths for current (c) bulbs share the voltage (d) one bulb out, all go out
32. 32.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) the shorter line (d) neither line
33. 33.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) an inverter socket (d) a small battery pack
34. 34.Which of these is safe? (a) use a cable with cuts (b) fly kites in open fields (c) fly a kite near wires (d) use mains for a project
35. 35.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) half the voltage (d) the same voltage
36. 36.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a toggle switch (c) a reed switch (d) a slide switch
37. 37.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) wire (b) junction (c) voltmeter (d) motor
38. 38.🔦 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 rubber eraser. Does the bulb glow? (a) No (b) Yes
39. 39.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 1.5 V (d) 230 V
40. 40.True or false: an iron nail is a conductor. (a) True (b) False

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