Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 758 · 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.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a closed circuit (d) a series circuit
2. 2.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a parallel circuit (c) a short circuit (d) an open circuit
3. 3.💡 3 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. Does bulb 2 glow? (a) No (b) Yes
4. 4.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
5. 5.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) movement energy (c) sound energy (d) light energy
6. 6.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
7. 7.🔍 Which is the odd one out? (a) a street light (b) a torch (c) a night lamp (d) an exhaust fan
8. 8.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
9. 9.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
10. 10.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
11. 11.Which of these mainly makes movement? (a) a loudspeaker (b) a rice cooker (c) a doorbell (d) an electric drill
12. 12.True or false: a tilt switch closes when tipped over. (a) True (b) False
13. 13.True or false: a steel spoon is a conductor. (a) True (b) False
14. 14.Which of these mainly makes sound? (a) a tube light (b) a siren (c) a street light (d) a traffic signal
15. 15.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) electrical energy (c) nuclear energy (d) wind energy
16. 16.Which of these is true of a series circuit? (a) each gets the full volts (b) own switch for each bulb (c) one bulb out, all go out (d) many paths for current
17. 17.🔍 Which is the odd one out? (a) an electric kettle (b) a buzzer (c) a school bell (d) a loudspeaker
18. 18.🔋 4 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)? =
19. 19.Which of these gives us electricity? (a) a mobile phone (b) a water pump (c) a generator (d) a computer
20. 20.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
21. 21.💡 Why is house wiring done in parallel? (a) so all go off together (b) to make bulbs dim (c) to save copper only (d) each gets full voltage
22. 22.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) an insulator (c) a switch that is ON (d) a cell
24. 24.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) series (b) parallel
25. 25.True or false: a toggle switch works only while pressed. (a) False (b) True
26. 26.Which of these is not safe? (a) dry your hands first (b) open a phone charger (c) stay away from pylons (d) keep drinks far away
27. 27.💡 A battery lights 4 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
28. 28.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes
29. 29.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
30. 30.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
31. 31.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
32. 32.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
33. 33.True or false: to touch a fallen wire is not safe. (a) False (b) True
34. 34.🔋 8 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)? =
35. 35.Which of these means the circuit is open? (a) the switch is ON (b) the switch is OFF (c) the loop is complete (d) all wires are joined
36. 36.🔦 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 plastic ruler. Does the bulb glow? (a) Yes (b) No
37. 37.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.🔘 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 OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
39. 39.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) wavy lines (c) little stars (d) straight lines
40. 40.🔍 Which is the odd one out? (a) an iron nail (b) a dry cork (c) a brass key (d) a safety pin

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