Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 886 · 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 does a switch do in a circuit? (a) stores current (b) makes electricity (c) opens or closes the loop (d) changes the voltage
2. 2.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) the switch is OFF (d) the switch is ON
3. 3.True or false: “a single current path” is true of a series circuit. (a) False (b) True
4. 4.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
5. 5.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 1.5 V (d) 9 V
6. 6.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
7. 7.🔌 Which metal is used for most electric wires at home? (a) copper (b) plastic (c) glass (d) rubber
8. 8.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) a full circuit (c) an open circuit (d) a closed circuit
9. 9.🔦 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) Yes (b) No
10. 10.⚡ What does an electric iron mainly change electricity into? (a) movement (b) light (c) heat (d) sound
11. 11.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) a bigger voltage (c) the same voltage (d) no voltage
12. 12.🔋 3 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)? =
13. 13.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) photons (c) water drops (d) dust particles
15. 15.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
16. 16.🔋 How many 1.2 V cells must be joined in series to give 6 V?
17. 17.True or false: a toggle switch flips up or down. (a) False (b) True
18. 18.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
19. 19.True or false: a wooden stick is a conductor. (a) False (b) True
20. 20.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the plastic handle (d) the metal tip
21. 21.True or false: a tilt switch stays where you flip it. (a) True (b) False
22. 22.💡 4 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 4 is taken out of its holder. How many bulbs glow?
23. 23.True or false: a tube light mainly gives out light. (a) False (b) True
24. 24.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
25. 25.🔍 Which is the odd one out? (a) stay away from pylons (b) use a cable with cuts (c) open a phone charger (d) climb an electric pole
26. 26.Which of these is a conductor? (a) a glass marble (b) a ceramic cup (c) a brass key (d) a paper strip
27. 27.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) bulb (b) resistor (c) battery (d) ammeter
28. 28.Which of these is not safe? (a) keep drinks far away (b) use mains for a project (c) use small battery cells (d) stop if a part gets hot
29. 29.True or false: an iron nail is a conductor. (a) True (b) False
30. 30.🔌 Is a rubber eraser a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) sound energy (c) wind energy (d) electrical energy
32. 32.🔋 How many 1.5 V cells must be joined in series to give 6 V?
33. 33.Which of these is safe? (a) touch a switch when wet (b) keep drinks far away (c) poke things in a socket (d) use mains for a project
34. 34.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
35. 35.True or false: to use a cable with cuts is not safe. (a) True (b) False
36. 36.🔦 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 graphite rod. Does the bulb glow? (a) Yes (b) No
37. 37.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
38. 38.⚡ What does a torch mainly change electricity into? (a) movement (b) heat (c) sound (d) light
39. 39.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
40. 40.True or false: to use a cable with cuts is safe. (a) False (b) True

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