Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 797 · 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.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
2. 2.💡 5 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
3. 3.Which of these mainly makes movement? (a) a water heater (b) a ceiling fan (c) an electric iron (d) a street light
4. 4.🔦 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) No (b) Yes
5. 5.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
6. 6.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
7. 7.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
8. 8.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
9. 9.True or false: to open a phone charger is safe. (a) True (b) False
10. 10.🔦 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 ceramic cup. Does the bulb glow? (a) No (b) Yes
11. 11.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
12. 12.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
13. 13.True or false: a rubber band is an insulator. (a) False (b) True
14. 14.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
15. 15.Which of these uses electricity? (a) a bicycle dynamo (b) a battery (c) a television (d) a cell
16. 16.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
17. 17.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
18. 18.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.🔋 5 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
20. 20.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) diode (b) capacitor (c) bulb (d) wire
21. 21.True or false: aluminium foil is an insulator. (a) True (b) False
22. 22.True or false: a glass marble is an insulator. (a) False (b) True
23. 23.🔌 Is a safety pin a conductor or an insulator? (a) a conductor (b) an insulator
24. 24.True or false: a mixer grinder mainly gives out heat. (a) True (b) False
25. 25.Which of these uses electricity? (a) a wind turbine (b) a cell (c) a water pump (d) a battery
26. 26.🔍 Which is the odd one out? (a) a water heater (b) a buzzer (c) an electric iron (d) a rice cooker
27. 27.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) light energy (c) chemical energy (d) movement energy
28. 28.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) to hide the circuit (d) quick and clear for all
29. 29.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
30. 30.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
31. 31.Which of these is an insulator? (a) a copper wire (b) a plastic straw (c) a safety pin (d) a brass key
32. 32.🔦 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 brass key. Does the bulb glow? (a) No (b) Yes
33. 33.True or false: a traffic signal mainly makes movement. (a) False (b) True
34. 34.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a series circuit (d) a closed circuit
35. 35.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
36. 36.🔘 A bulb and a cell are joined through 5 switches on 5 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
37. 37.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
38. 38.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
39. 39.🔦 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 metal paper clip. Does the bulb glow? (a) Yes (b) No
40. 40.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V

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