Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 499 · 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.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
2. 2.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the bare end (c) the steel shaft (d) the metal tip
3. 3.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
4. 4.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
5. 5.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
6. 6.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
7. 7.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
8. 8.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
9. 9.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
10. 10.🔋 2 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)? =
11. 11.Which of these is a conductor? (a) a paper strip (b) a glass marble (c) a wooden stick (d) a graphite rod
12. 12.💡 6 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
13. 13.🔘 When a switch is ON, the circuit is … (a) closed (b) cut (c) broken (d) open
14. 14.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
15. 15.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) junction (b) battery (c) switch (d) ammeter
16. 16.Which of these mainly makes movement? (a) a tube light (b) an electric iron (c) a ceiling fan (d) a water heater
17. 17.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
19. 19.🔘 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 ON, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they explode (c) they keep glowing (d) they all go out
21. 21.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
22. 22.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
23. 23.Which of these means the circuit is closed? (a) a wire is cut (b) the bulb is unscrewed (c) a cell is taken out (d) all wires are joined
24. 24.True or false: an electric toy car mainly makes movement. (a) True (b) False
25. 25.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
26. 26.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
27. 27.What does a push button do? (a) flips up or down (b) closes near a magnet (c) works only while pressed (d) stays where you flip it
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 a plastic straw. Does the bulb glow? (a) No (b) Yes
29. 29.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
30. 30.Which of these is safe? (a) open a phone charger (b) use a cable with cuts (c) touch a fallen wire (d) dry your hands first
31. 31.True or false: to stay away from pylons is not safe. (a) True (b) False
32. 32.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
33. 33.Which of these gives us electricity? (a) a computer (b) a mobile phone (c) an air conditioner (d) a power station
34. 34.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a smaller voltage (d) a bigger voltage
35. 35.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
36. 36.Which drawing is the symbol for a resistor? (a) a small empty box (b) a straight line (c) a circle with a cross (d) triangle against a bar
37. 37.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) nuclear energy (c) electrical energy (d) wind energy
38. 38.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
39. 39.Which of these mainly gives out heat? (a) an LED lamp (b) a night lamp (c) a water heater (d) a doorbell
40. 40.True or false: a plain rectangle is the symbol for a resistor. (a) True (b) False

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