Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 258 · 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.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
2. 2.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) capacitor (b) ammeter (c) voltmeter (d) battery
3. 3.True or false: an electric drill mainly gives out heat. (a) True (b) False
4. 4.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
5. 5.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) an open circuit (d) a series circuit
6. 6.💡 A battery lights 5 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
7. 7.🔦 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
8. 8.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a bulb (d) a plug top
9. 9.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
10. 10.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the bare end (d) the steel shaft
11. 11.Which of these is not safe? (a) dry your hands first (b) open a phone charger (c) use small battery cells (d) take cells out after use
12. 12.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
13. 13.💡 5 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?
14. 14.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
15. 15.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) a wire has come loose (d) the loop is complete
16. 16.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) a cell (d) an insulator
17. 17.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a push button (c) a tilt switch (d) a reed switch
18. 18.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
19. 19.Which of these mainly gives out light? (a) a street light (b) a siren (c) an electric iron (d) a room heater
20. 20.💡 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
21. 21.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) Yes (b) No
22. 22.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) one out, the rest glow (d) bulbs share the voltage
23. 23.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) water drops (c) dust particles (d) electrons
24. 24.True or false: a rubber eraser is an insulator. (a) False (b) True
25. 25.True or false: to open a phone charger is not safe. (a) False (b) True
26. 26.⚡ What does a street light mainly change electricity into? (a) sound (b) movement (c) heat (d) light
27. 27.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) wind energy (c) electrical energy (d) sound energy
28. 28.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a parallel circuit (c) an open circuit (d) a safe circuit
29. 29.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
30. 30.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
31. 31.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
32. 32.💡 2 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
33. 33.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) both of them (d) it does not matter
34. 34.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) cut (d) broken
35. 35.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
36. 36.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) No (b) Yes
38. 38.True or false: an electric drill mainly makes movement. (a) False (b) True
39. 39.True or false: aluminium foil is an insulator. (a) True (b) False
40. 40.True or false: a toaster mainly gives out heat. (a) True (b) False

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