Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 774 · 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.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) Yes (b) No
3. 3.🔋 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)? =
4. 4.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
5. 5.🔋 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)? =
6. 6.True or false: a circle with an X in it is the symbol for a battery. (a) True (b) False
7. 7.True or false: a reed switch closes near a magnet. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a school bell (b) a street light (c) a traffic signal (d) a torch
9. 9.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
10. 10.True or false: a doorbell mainly makes movement. (a) True (b) False
11. 11.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) No (b) Yes
12. 12.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) an insulator (c) a cell (d) a conductor
13. 13.True or false: a buzzer mainly makes sound. (a) True (b) False
14. 14.True or false: to fly a kite near wires is safe. (a) True (b) False
15. 15.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a small battery pack (d) a mains extension board
16. 16.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.True or false: a plastic ruler is an insulator. (a) True (b) False
18. 18.💡 6 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. How many bulbs glow?
19. 19.🔦 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 copper wire. Does the bulb glow? (a) Yes (b) No
20. 20.🔋 5 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
21. 21.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
22. 22.🔍 Which is the odd one out? (a) a doorbell (b) a loudspeaker (c) a torch (d) a buzzer
23. 23.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
24. 24.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
25. 25.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
26. 26.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) used in house wiring (c) a single current path (d) a break stops every bulb
27. 27.🔍 Which is the odd one out? (a) an electric kettle (b) a rice cooker (c) an electric iron (d) a tube light
28. 28.Which of these gives us electricity? (a) an air conditioner (b) a mobile phone (c) a computer (d) a bicycle dynamo
29. 29.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
30. 30.Which of these is safe? (a) touch a fallen wire (b) build with an adult near (c) fly a kite near wires (d) climb an electric pole
31. 31.💡 4 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
32. 32.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
33. 33.True or false: if the switch is OFF, the circuit is open and no current flows. (a) True (b) False
34. 34.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the base (c) the glass (d) the switch
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
36. 36.Which of these uses electricity? (a) a generator (b) a washing machine (c) a wind turbine (d) a power station
37. 37.🔘 What does a switch do in a circuit? (a) stores current (b) changes the voltage (c) opens or closes the loop (d) makes electricity
38. 38.🔌 Is a wooden stick a conductor or an insulator? (a) an insulator (b) a conductor
39. 39.🔦 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 a safety pin. Does the bulb glow? (a) No (b) Yes
40. 40.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a plug top (d) a bulb

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