Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 247 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.Which of these mainly gives out light? (a) a torch (b) a siren (c) an exhaust fan (d) a ceiling fan
3. 3.Which drawing is the symbol for a capacitor? (a) a plain rectangle (b) many long-short pairs (c) two equal parallel lines (d) a circle with M inside
4. 4.Which of these is a conductor? (a) a cotton thread (b) a plastic straw (c) a steel coin (d) a ceramic cup
5. 5.⚡ What does a night lamp mainly change electricity into? (a) light (b) movement (c) heat (d) sound
6. 6.🔍 Which is the odd one out? (a) aluminium foil (b) a paper strip (c) a ceramic cup (d) a glass marble
7. 7.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) bulb (b) resistor (c) battery (d) diode
8. 8.Which of these means the circuit is open? (a) the switch is OFF (b) all wires are joined (c) the loop is complete (d) the switch is ON
9. 9.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) in series (d) not joined
11. 11.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
12. 12.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
13. 13.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
14. 14.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) a single current path (d) one out, the rest glow
15. 15.True or false: a long and a short line is the symbol for an LED. (a) True (b) False
16. 16.Which drawing is the symbol for a motor? (a) two equal parallel lines (b) a circle with M inside (c) two or more cell symbols (d) a circle with an X in it
17. 17.True or false: two or more cell symbols is the symbol for an ammeter. (a) True (b) False
18. 18.🔋 Does an air conditioner give electricity or use electricity? (a) uses electricity (b) gives electricity
19. 19.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) a plastic ruler (b) a plastic straw (c) a rubber eraser (d) a metal paper clip
21. 21.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
22. 22.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) diode (b) bulb (c) cell (d) resistor
23. 23.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
24. 24.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
25. 25.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 230 V (c) 12 V (d) 9 V
26. 26.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
27. 27.True or false: to use mains for a project is not safe. (a) True (b) False
28. 28.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
29. 29.Which of these is safe? (a) touch a switch when wet (b) use a cable with cuts (c) poke things in a socket (d) use small battery cells
30. 30.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) nuclear energy (c) sound energy (d) electrical energy
31. 31.Which of these mainly makes sound? (a) a water heater (b) a buzzer (c) an electric drill (d) an electric iron
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
33. 33.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
34. 34.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
35. 35.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
36. 36.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
37. 37.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
38. 38.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a switch with a lid (d) a kind of bulb
39. 39.Which of these mainly makes sound? (a) a loudspeaker (b) a ceiling fan (c) a night lamp (d) an electric kettle
40. 40.🔁 What must there be for a current to flow? (a) a complete loop (b) one loose end (c) a broken path (d) a plastic gap

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