Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 110 · 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.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
2. 2.Which of these means the circuit is closed? (a) the switch is ON (b) a wire has come loose (c) the switch is OFF (d) the bulb is unscrewed
3. 3.Which of these uses electricity? (a) a wind turbine (b) a cell (c) a computer (d) a bicycle dynamo
4. 4.💡 3 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 2 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
5. 5.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 9 V (c) 1.5 V (d) 230 V
6. 6.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
7. 7.What does a push button do? (a) stays where you flip it (b) closes near a magnet (c) springs back when let go (d) closes when tipped over
8. 8.Which of these is an insulator? (a) a graphite rod (b) a wooden stick (c) a copper wire (d) an iron nail
9. 9.Which of these is true of a series circuit? (a) many paths for current (b) bulbs share the voltage (c) used in house wiring (d) own switch for each bulb
10. 10.🔦 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
11. 11.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) junction (b) battery (c) ammeter (d) bulb
12. 12.Which of these is true of a parallel circuit? (a) used in house wiring (b) a single current path (c) one bulb out, all go out (d) a break stops every bulb
13. 13.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
14. 14.Which of these is not safe? (a) poke things in a socket (b) dry your hands first (c) take cells out after use (d) build with an adult near
15. 15.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a rubber band. Does the bulb glow? (a) Yes (b) No
16. 16.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
17. 17.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a toggle switch (c) a slide switch (d) a reed switch
18. 18.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
19. 19.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) in parallel (d) not joined
20. 20.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
21. 21.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
22. 22.🔍 Which is the odd one out? (a) a night lamp (b) a doorbell (c) a traffic signal (d) an LED lamp
23. 23.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a series circuit (c) a closed circuit (d) an open circuit
24. 24.🔍 Which is the odd one out? (a) a siren (b) a mixer grinder (c) a buzzer (d) a loudspeaker
25. 25.🔘 A bulb and a cell are joined through 3 switches on 3 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?
26. 26.True or false: a steel spoon is a conductor. (a) True (b) False
27. 27.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) light energy (c) sound energy (d) movement energy
28. 28.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
29. 29.🔘 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
30. 30.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
31. 31.True or false: a tilt switch closes when tipped over. (a) True (b) False
32. 32.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) the shorter line (d) neither line
33. 33.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
34. 34.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
35. 35.True or false: a push button closes when tipped over. (a) True (b) False
36. 36.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
37. 37.🔘 What does a switch do in a circuit? (a) stores current (b) opens or closes the loop (c) changes the voltage (d) makes electricity
38. 38.True or false: to climb an electric pole is safe. (a) False (b) True
39. 39.Which of these is an insulator? (a) a brass key (b) a steel spoon (c) a steel coin (d) a glass marble
40. 40.True or false: a toggle switch slides side to side. (a) False (b) True

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