Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 501 · 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 is the odd one out? (a) a torch (b) an electric toy car (c) an exhaust fan (d) a ceiling fan
2. 2.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
3. 3.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
4. 4.Which of these means the circuit is open? (a) a wire has come loose (b) the switch is ON (c) the loop is complete (d) all wires are joined
5. 5.🔍 Which is the odd one out? (a) a table fan (b) a tube light (c) an electric drill (d) an electric toy car
6. 6.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
7. 7.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) both of them (c) only one (d) none
8. 8.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) when either is ON (c) when both are OFF (d) never
9. 9.🔍 Which is the odd one out? (a) stay away from pylons (b) fly kites in open fields (c) take cells out after use (d) throw cells in a fire
10. 10.True or false: “a single current path” is true of a series circuit. (a) False (b) True
11. 11.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
12. 12.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) a safe circuit (d) an open circuit
13. 13.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a reed switch (c) a push button (d) a tilt switch
14. 14.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the switch (d) the filament
15. 15.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
16. 16.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) resistor (b) ammeter (c) diode (d) switch
17. 17.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a wall socket (d) a mains extension board
19. 19.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) so all go off together (d) to make bulbs dim
20. 20.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
21. 21.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) a bigger voltage (d) the same voltage
22. 22.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) voltmeter (b) resistor (c) cell (d) LED
23. 23.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) LED (b) cell (c) junction (d) switch
24. 24.🔘 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) Yes (b) No
25. 25.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
26. 26.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) one for each bulb (d) none
27. 27.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they get dimmer (d) they keep glowing
28. 28.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
29. 29.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) capacitor (b) battery (c) cell (d) diode
30. 30.Which of these means the circuit is closed? (a) a wire is cut (b) the bulb is unscrewed (c) a wire has come loose (d) the switch is ON
31. 31.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
32. 32.Which of these means the circuit is open? (a) the loop is complete (b) a wire is cut (c) all wires are joined (d) the switch is ON
33. 33.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is OFF and D is ON. Does the bulb glow? (a) No (b) Yes
34. 34.⚡ What does an LED lamp mainly change electricity into? (a) heat (b) movement (c) light (d) sound
35. 35.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
36. 36.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
37. 37.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
38. 38.Which of these is an insulator? (a) a graphite rod (b) a brass key (c) aluminium foil (d) a plastic ruler
39. 39.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) a single current path (d) a break stops every bulb
40. 40.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =

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