Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 811 · 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.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) to hide the circuit (c) symbols are heavier (d) quick and clear for all
2. 2.Which of these mainly gives out light? (a) a doorbell (b) a rice cooker (c) a school bell (d) a street light
3. 3.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) the same voltage (d) no voltage
4. 4.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
5. 5.Which of these is an insulator? (a) an iron nail (b) a plastic ruler (c) a copper wire (d) a brass key
6. 6.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a plastic gap (d) a complete loop
7. 7.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
8. 8.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
9. 9.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) a stranger online (d) nobody
10. 10.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) junction (c) wire (d) capacitor
11. 11.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) it does not matter (d) both of them
12. 12.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
13. 13.What does a toggle switch do? (a) slides side to side (b) closes near a magnet (c) springs back when let go (d) stays where you flip it
14. 14.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
15. 15.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire has come loose (c) a wire is cut (d) all wires are joined
16. 16.Which drawing is the symbol for a switch? (a) a dot where wires meet (b) two or more cell symbols (c) a plain rectangle (d) a line lifted at a gap
17. 17.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a safe circuit (d) a short circuit
18. 18.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) movement energy (c) chemical energy (d) sound energy
19. 19.⚡ What does an electric toy car mainly change electricity into? (a) movement (b) sound (c) light (d) heat
20. 20.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
22. 22.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
23. 23.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a tilt switch (c) a slide switch (d) a toggle switch
24. 24.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the base (c) the switch (d) the glass
25. 25.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) dotted circles (c) wavy lines (d) little stars
26. 26.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) a wall socket (c) a small battery pack (d) an inverter socket
27. 27.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
28. 28.True or false: triangle against a bar is the symbol for a diode. (a) True (b) False
29. 29.🔋 5 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
30. 30.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
31. 31.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a single current path (c) a break stops every bulb (d) used in house wiring
32. 32.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) voltmeter (b) wire (c) junction (d) cell
33. 33.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a paper strip. Does the bulb glow? (a) Yes (b) No
35. 35.Which of these is not safe? (a) fly a kite near wires (b) build with an adult near (c) dry your hands first (d) take cells out after use
36. 36.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
37. 37.🔘 Which kind of switch flips up or down? (a) a push button (b) a toggle switch (c) a slide switch (d) a tilt switch
38. 38.🔍 Which is the odd one out? (a) a ceramic cup (b) a copper wire (c) a wooden stick (d) a paper strip
39. 39.True or false: many long-short pairs is the symbol for a battery. (a) False (b) True
40. 40.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =

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