Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 267 · 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: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
2. 2.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
3. 3.🔦 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 rubber band. Does the bulb glow? (a) No (b) Yes
4. 4.True or false: a slide switch closes when tipped over. (a) False (b) True
5. 5.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) motor (b) capacitor (c) resistor (d) diode
6. 6.Which of these is safe? (a) touch a fallen wire (b) use small battery cells (c) use mains for a project (d) use a cable with cuts
7. 7.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) wire (b) ammeter (c) battery (d) LED
8. 8.🔍 Which is the odd one out? (a) climb an electric pole (b) fly kites in open fields (c) touch a switch when wet (d) use a cable with cuts
9. 9.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
10. 10.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
11. 11.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
12. 12.Which of these is an insulator? (a) a steel coin (b) aluminium foil (c) a dry cork (d) a steel spoon
13. 13.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
14. 14.Which of these is a conductor? (a) aluminium foil (b) a rubber eraser (c) a woollen thread (d) a plastic straw
15. 15.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
16. 16.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
17. 17.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
19. 19.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 9 V (c) 1.5 V (d) 230 V
20. 20.True or false: to use small battery cells is safe. (a) False (b) True
21. 21.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) a series circuit (d) an open circuit
22. 22.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) a break stops every bulb (d) many paths for current
23. 23.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
24. 24.Which of these gives us electricity? (a) a computer (b) a wind turbine (c) a television (d) an air conditioner
25. 25.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
26. 26.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) by Wi-Fi (d) not joined
27. 27.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
28. 28.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
29. 29.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
30. 30.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
31. 31.🔍 Which is the odd one out? (a) throw cells in a fire (b) use mains for a project (c) use a cable with cuts (d) use small battery cells
32. 32.🔋 3 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)? =
33. 33.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
34. 34.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
35. 35.True or false: a toggle switch stays where you flip it. (a) True (b) False
36. 36.Which of these is not safe? (a) stay away from pylons (b) dry your hands first (c) climb an electric pole (d) fly kites in open fields
37. 37.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) makes electricity (d) stores current
38. 38.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
39. 39.True or false: to climb an electric pole is safe. (a) False (b) True
40. 40.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity

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