Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 932 · 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: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
2. 2.Which of these is not safe? (a) stop if a part gets hot (b) use small battery cells (c) dry your hands first (d) poke things in a socket
3. 3.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) an open circuit (c) a parallel circuit (d) a short circuit
4. 4.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) battery (b) cell (c) diode (d) voltmeter
5. 5.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are ON (d) when both are OFF
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) both of them (c) it does not matter (d) none
7. 7.⚠️ Is it safe to open a phone charger? (a) not safe (b) safe
8. 8.🔁 What must there be for a current to flow? (a) a broken path (b) a plastic gap (c) one loose end (d) a complete loop
9. 9.Which of these is a conductor? (a) a plastic straw (b) a woollen thread (c) a rubber band (d) aluminium foil
10. 10.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a bigger voltage (d) a smaller voltage
11. 11.🔍 Which is the odd one out? (a) a plastic straw (b) a cotton thread (c) a paper strip (d) a copper wire
12. 12.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
13. 13.True or false: a safety pin is an insulator. (a) True (b) False
14. 14.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
15. 15.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a toggle switch (c) a reed switch (d) a push button
16. 16.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
17. 17.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.What does a toggle switch do? (a) works only while pressed (b) closes when tipped over (c) flips up or down (d) springs back when let go
19. 19.True or false: a toaster mainly makes sound. (a) False (b) True
20. 20.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) a single current path (d) used in house wiring
21. 21.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
22. 22.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) one single wire (d) two or more cells joined
23. 23.🔍 Which is the odd one out? (a) an electric toy car (b) a ceiling fan (c) a table fan (d) a torch
24. 24.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
25. 25.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
26. 26.💡 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. All the bulbs are in place. Does bulb 2 glow? (a) Yes (b) No
27. 27.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
28. 28.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) none (d) one
29. 29.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
30. 30.Which of these is safe? (a) touch a fallen wire (b) throw cells in a fire (c) poke things in a socket (d) stop if a part gets hot
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 15 V (c) 1.5 V (d) 0.5 V
33. 33.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the steel shaft (c) the metal tip (d) the plastic handle
34. 34.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
35. 35.Which of these means the circuit is closed? (a) the switch is OFF (b) all wires are joined (c) a wire is cut (d) a cell is taken out
36. 36.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) ammeter (b) cell (c) diode (d) bulb
37. 37.True or false: an electric kettle mainly gives out light. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a graphite rod (b) an iron nail (c) a plastic ruler (d) aluminium foil
39. 39.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
40. 40.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes

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