Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 944 · 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.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
2. 2.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) by Wi-Fi (c) in series (d) not joined
3. 3.🔋 How many 3 V cells must be joined in series to give 9 V?
4. 4.🔦 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) No (b) Yes
5. 5.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
6. 6.🔘 Which kind of switch closes when tipped over? (a) a toggle switch (b) a push button (c) a tilt switch (d) a reed switch
7. 7.Which of these is safe? (a) build with an adult near (b) fly a kite near wires (c) use mains for a project (d) touch a fallen wire
8. 8.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
9. 9.🔦 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 cotton thread. Does the bulb glow? (a) Yes (b) No
10. 10.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
11. 11.Which of these mainly makes movement? (a) a toaster (b) a buzzer (c) a night lamp (d) an exhaust fan
12. 12.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a copper wire. Does the bulb glow? (a) No (b) Yes
13. 13.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
14. 14.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) the longer line (d) both lines
15. 15.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
16. 16.🔋 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)? =
17. 17.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the bare end (d) the plastic handle
18. 18.What does a tilt switch do? (a) works only while pressed (b) closes near a magnet (c) closes when tipped over (d) springs back when let go
19. 19.Which of these gives us electricity? (a) an air conditioner (b) a solar panel (c) a refrigerator (d) a television
20. 20.True or false: if the switch is OFF, the circuit is closed and current flows. (a) False (b) True
21. 21.Which of these is a conductor? (a) a rubber eraser (b) a dry cork (c) a plastic straw (d) a graphite rod
22. 22.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) two or more cells joined (d) a kind of bulb
24. 24.True or false: a cotton thread is an insulator. (a) True (b) False
25. 25.🔘 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) Yes (b) No
26. 26.True or false: a toggle switch stays where you flip it. (a) True (b) False
27. 27.🔦 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
28. 28.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
29. 29.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
30. 30.True or false: a reed switch stays where you flip it. (a) False (b) True
31. 31.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
32. 32.🔍 Which is the odd one out? (a) a ceiling fan (b) an electric toy car (c) an electric kettle (d) an exhaust fan
33. 33.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 230 V (d) 15 V
34. 34.Which of these is a conductor? (a) a rubber band (b) a wooden stick (c) a copper wire (d) a plastic straw
35. 35.🔍 Which is the odd one out? (a) stop if a part gets hot (b) keep drinks far away (c) build with an adult near (d) poke things in a socket
36. 36.True or false: to fly kites in open fields is safe. (a) False (b) True
37. 37.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
38. 38.Which of these mainly makes movement? (a) a water heater (b) a night lamp (c) a ceiling fan (d) a room heater
39. 39.⚡ What does an electric drill mainly change electricity into? (a) movement (b) sound (c) heat (d) light
40. 40.True or false: a dot where wires meet is the symbol for a junction. (a) False (b) True

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