Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 495 · 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.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
2. 2.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) a switch with a lid (d) two or more cells joined
3. 3.🔘 Which kind of switch closes when tipped over? (a) a push button (b) a toggle switch (c) a slide switch (d) a tilt switch
4. 4.🔦 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
5. 5.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a slide switch (c) a tilt switch (d) a push button
6. 6.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 230 V (c) 9 V (d) 12 V
7. 7.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) resistor (b) capacitor (c) motor (d) switch
8. 8.Which of these is an insulator? (a) a metal paper clip (b) a brass key (c) a graphite rod (d) a ceramic cup
9. 9.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
10. 10.True or false: to poke things in a socket is not safe. (a) False (b) True
11. 11.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
12. 12.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
13. 13.True or false: to open a phone charger is not safe. (a) True (b) False
14. 14.💡 Why is house wiring done in parallel? (a) so all go off together (b) to save copper only (c) to make bulbs dim (d) each gets full voltage
15. 15.True or false: to throw cells in a fire is safe. (a) False (b) True
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
17. 17.🔘 What does a switch do in a circuit? (a) makes electricity (b) opens or closes the loop (c) changes the voltage (d) stores current
18. 18.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
19. 19.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
20. 20.True or false: a dry cork is a conductor. (a) False (b) True
21. 21.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) the switch is OFF
22. 22.Which drawing is the symbol for a motor? (a) a circle with M inside (b) triangle, bar and arrows (c) many long-short pairs (d) a small empty box
23. 23.Which of these is not safe? (a) touch a switch when wet (b) build with an adult near (c) keep drinks far away (d) take cells out after use
24. 24.True or false: a table fan mainly makes movement. (a) False (b) True
25. 25.🔦 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 a rubber eraser. Does the bulb glow? (a) Yes (b) No
26. 26.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire has come loose (c) the switch is OFF (d) the switch is ON
27. 27.True or false: a glass marble is a conductor. (a) True (b) False
28. 28.True or false: to keep drinks far away is safe. (a) False (b) True
29. 29.What does a reed switch do? (a) springs back when let go (b) stays where you flip it (c) closes when tipped over (d) closes near a magnet
30. 30.Which of these mainly makes movement? (a) a rice cooker (b) an exhaust fan (c) a siren (d) a night lamp
31. 31.True or false: a room heater mainly makes sound. (a) False (b) True
32. 32.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
33. 33.⚠️ Who should be with you when you build a circuit? (a) a younger child (b) nobody (c) a stranger online (d) a trusted adult
34. 34.🔍 Which is the odd one out? (a) climb an electric pole (b) use a cable with cuts (c) keep drinks far away (d) use mains for a project
35. 35.Which of these gives us electricity? (a) a water pump (b) a television (c) an air conditioner (d) a cell
36. 36.Which of these is safe? (a) open a phone charger (b) take cells out after use (c) touch a fallen wire (d) touch a switch when wet
37. 37.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by aluminium foil. Does the bulb glow? (a) Yes (b) No
38. 38.True or false: to open a phone charger is safe. (a) False (b) True
39. 39.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
40. 40.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe

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