Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 925 · 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.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) broken (d) cut
2. 2.🔋 How many 2 V cells must be joined in series to give 4 V?
3. 3.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
4. 4.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
5. 5.🔍 Which is the odd one out? (a) a street light (b) a room heater (c) an LED lamp (d) a traffic signal
6. 6.Which of these is true of a series circuit? (a) one out, the rest glow (b) own switch for each bulb (c) many paths for current (d) one bulb out, all go out
7. 7.🔦 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
8. 8.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
9. 9.Which of these is not safe? (a) build with an adult near (b) keep drinks far away (c) open a phone charger (d) use small battery cells
10. 10.⚡ What does a loudspeaker mainly change electricity into? (a) light (b) heat (c) movement (d) sound
11. 11.True or false: a toggle switch stays where you flip it. (a) True (b) False
12. 12.⚡ What does an electric iron mainly change electricity into? (a) movement (b) sound (c) light (d) heat
13. 13.🔌 Which metal is used for most electric wires at home? (a) plastic (b) copper (c) glass (d) rubber
14. 14.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) diode (c) ammeter (d) LED
15. 15.True or false: a circle with M inside is the symbol for a motor. (a) True (b) False
16. 16.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
17. 17.🔍 Which is the odd one out? (a) a doorbell (b) a loudspeaker (c) an electric iron (d) a buzzer
18. 18.True or false: a copper wire is an insulator. (a) False (b) True
19. 19.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
20. 20.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
21. 21.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
22. 22.True or false: a plastic ruler is a conductor. (a) True (b) False
23. 23.True or false: a tube light mainly gives out light. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) stay away from pylons (b) fly kites in open fields (c) stop if a part gets hot (d) throw cells in a fire
25. 25.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
26. 26.🔘 A bulb and a cell are joined through 2 switches on 2 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?
27. 27.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) ammeter (c) motor (d) resistor
28. 28.🔘 What does a switch do in a circuit? (a) opens or closes the loop (b) stores current (c) makes electricity (d) changes the voltage
29. 29.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
30. 30.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) one loose end (d) a complete loop
31. 31.🔋 6 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)? =
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
34. 34.Which of these is an insulator? (a) a steel spoon (b) a paper strip (c) a copper wire (d) a safety pin
35. 35.Which of these is true of a parallel circuit? (a) a single current path (b) one out, the rest glow (c) bulbs share the voltage (d) one bulb out, all go out
36. 36.What does a push button do? (a) springs back when let go (b) slides side to side (c) closes near a magnet (d) stays where you flip it
37. 37.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
38. 38.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
39. 39.💡 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?
40. 40.🔍 Which is the odd one out? (a) stay away from pylons (b) poke things in a socket (c) use a cable with cuts (d) use mains for a project

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