Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 389 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) No (b) Yes
2. 2.Which of these is true of a series circuit? (a) used in house wiring (b) own switch for each bulb (c) many paths for current (d) a single current path
3. 3.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
4. 4.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
5. 5.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) a safe circuit (d) an open circuit
6. 6.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
7. 7.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic is a conductor (d) plastic makes current
8. 8.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
9. 9.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
10. 10.🔍 Which is the odd one out? (a) fly kites in open fields (b) keep drinks far away (c) poke things in a socket (d) stay away from pylons
11. 11.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
12. 12.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
13. 13.Which of these is not safe? (a) dry your hands first (b) stop if a part gets hot (c) throw cells in a fire (d) use small battery cells
14. 14.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
15. 15.⚡ What does a night lamp mainly change electricity into? (a) light (b) sound (c) movement (d) heat
16. 16.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
17. 17.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) chemical energy (c) sound energy (d) light energy
18. 18.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) a wire has come loose
19. 19.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
20. 20.Which of these is a conductor? (a) a paper strip (b) a copper wire (c) a dry cork (d) a plastic straw
21. 21.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a tilt switch (c) a push button (d) a toggle switch
22. 22.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a cell (d) a conductor
24. 24.True or false: to stay away from pylons is not safe. (a) True (b) False
25. 25.⚡ What does a ceiling fan mainly change electricity into? (a) light (b) sound (c) heat (d) movement
26. 26.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) friction (c) electric current (d) sound
27. 27.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
28. 28.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
29. 29.Which of these is safe? (a) touch a switch when wet (b) touch a fallen wire (c) poke things in a socket (d) build with an adult near
30. 30.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
31. 31.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) switch (c) resistor (d) wire
32. 32.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
34. 34.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
35. 35.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
36. 36.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 230 V (c) 0.5 V (d) 15 V
37. 37.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) a cell is taken out (d) the switch is ON
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 an iron nail. Does the bulb glow? (a) Yes (b) No
39. 39.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
40. 40.🔘 When a switch is ON, the circuit is … (a) cut (b) open (c) closed (d) broken

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