Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 621 · 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.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the shorter line (c) neither line (d) the longer line
2. 2.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
3. 3.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
4. 4.True or false: “a single current path” is true of a series circuit. (a) True (b) False
5. 5.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) wire (b) motor (c) diode (d) capacitor
6. 6.True or false: to touch a switch when wet is safe. (a) False (b) True
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles
8. 8.🔍 Which is the odd one out? (a) throw cells in a fire (b) use a cable with cuts (c) use small battery cells (d) poke things in a socket
9. 9.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
10. 10.Which drawing is the symbol for an ammeter? (a) a circle with an X in it (b) two or more cell symbols (c) two equal parallel lines (d) a circle with A inside
11. 11.Which of these mainly gives out light? (a) a buzzer (b) an LED lamp (c) a ceiling fan (d) a rice cooker
12. 12.🔦 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) Yes (b) No
13. 13.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
14. 14.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
15. 15.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) chemical energy (c) sound energy (d) light energy
16. 16.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) so all go off together (d) each gets full voltage
17. 17.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
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. Does the bulb glow? (a) No (b) Yes
20. 20.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
21. 21.🔘 Which kind of switch flips up or down? (a) a reed switch (b) a push button (c) a toggle switch (d) a slide switch
22. 22.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
23. 23.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) a cell is taken out (d) the loop is complete
24. 24.Which of these is an insulator? (a) a ceramic cup (b) a steel spoon (c) an iron nail (d) a safety pin
25. 25.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) switch (c) ammeter (d) wire
26. 26.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) switch (b) LED (c) resistor (d) junction
27. 27.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
28. 28.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) a circle with an X in it (c) one tall, one short bar (d) a small empty box
29. 29.What does a reed switch do? (a) springs back when let go (b) works only while pressed (c) closes near a magnet (d) stays where you flip it
30. 30.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a mains extension board (d) a wall socket
31. 31.True or false: an LED lamp mainly gives out light. (a) True (b) False
32. 32.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
33. 33.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
34. 34.🔍 Which is the odd one out? (a) an LED lamp (b) a street light (c) a tube light (d) a mixer grinder
35. 35.Which of these is an insulator? (a) a brass key (b) aluminium foil (c) an iron nail (d) a plastic straw
36. 36.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
37. 37.⚡ Which tiny particles drift along a metal wire to carry the current? (a) photons (b) dust particles (c) water drops (d) electrons
38. 38.Which of these mainly gives out light? (a) a room heater (b) a doorbell (c) an electric drill (d) a tube light
39. 39.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
40. 40.🔌 Most metals are good … (a) conductors (b) batteries (c) insulators (d) magnets only

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