Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 78 · 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: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
2. 2.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) bulb (b) switch (c) voltmeter (d) diode
3. 3.🔘 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?
4. 4.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
5. 5.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the bare end (d) the steel shaft
6. 6.True or false: a push button springs back when let go. (a) True (b) False
7. 7.⚡ What does an electric iron mainly change electricity into? (a) movement (b) heat (c) light (d) sound
8. 8.🔘 What does a switch do in a circuit? (a) changes the voltage (b) makes electricity (c) opens or closes the loop (d) stores current
9. 9.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) Yes (b) No
10. 10.Which drawing is the symbol for a cell? (a) a line lifted at a gap (b) a circle with V inside (c) one tall, one short bar (d) a circle with M inside
11. 11.True or false: to throw cells in a fire is not safe. (a) True (b) False
12. 12.💡 3 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 1 glow? (a) No (b) Yes
13. 13.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) a break stops every bulb (d) many paths for current
14. 14.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the filament (c) the base (d) the switch
15. 15.True or false: a ceramic cup is a conductor. (a) False (b) True
16. 16.True or false: to poke things in a socket is safe. (a) True (b) False
17. 17.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
18. 18.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) none (c) it does not matter (d) only one
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they all go out (d) they explode
20. 20.🔦 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 ceramic cup. Does the bulb glow? (a) Yes (b) No
21. 21.🔘 Which kind of switch slides side to side? (a) a toggle switch (b) a slide switch (c) a push button (d) a reed switch
22. 22.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
23. 23.🔌 Is a steel coin a conductor or an insulator? (a) an insulator (b) a conductor
24. 24.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
25. 25.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
26. 26.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
27. 27.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) both lines (d) neither line
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) No (b) Yes
29. 29.🔦 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 brass key. Does the bulb glow? (a) Yes (b) No
30. 30.🔍 Which is the odd one out? (a) stay away from pylons (b) take cells out after use (c) keep drinks far away (d) fly a kite near wires
31. 31.⚡ What does an electric kettle mainly change electricity into? (a) light (b) sound (c) movement (d) heat
32. 32.🔋 How many 2 V cells must be joined in series to give 16 V?
33. 33.🔦 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 wooden stick. Does the bulb glow? (a) Yes (b) No
34. 34.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
35. 35.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) capacitor (c) diode (d) switch
36. 36.⚡ A fan changes electrical energy mainly into which kind of energy? (a) chemical energy (b) movement energy (c) light energy (d) sound energy
37. 37.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.💡 5 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?
39. 39.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
40. 40.True or false: a tilt switch flips up or down. (a) False (b) True

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