Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 818 · 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) use small battery cells (b) touch a fallen wire (c) take cells out after use (d) stay away from pylons
2. 2.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) two or more cells joined (d) a kind of bulb
3. 3.Which of these is a conductor? (a) a dry cork (b) a steel spoon (c) a rubber eraser (d) a ceramic cup
4. 4.True or false: a doorbell mainly gives out heat. (a) False (b) True
5. 5.Which of these is an insulator? (a) a brass key (b) a dry cork (c) a safety pin (d) a steel coin
6. 6.True or false: to use a cable with cuts is not safe. (a) False (b) True
7. 7.🔘 When a switch is ON, the circuit is … (a) closed (b) cut (c) open (d) broken
8. 8.What does a slide switch do? (a) slides side to side (b) flips up or down (c) stays where you flip it (d) works only while pressed
9. 9.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
10. 10.🔍 Which is the odd one out? (a) use mains for a project (b) use a cable with cuts (c) poke things in a socket (d) stay away from pylons
11. 11.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) so all go off together (c) to make bulbs dim (d) to save copper only
12. 12.⚠️ Why must we never touch switches with wet hands? (a) water makes it cold (b) it spoils the paint (c) it is just untidy (d) water carries current
13. 13.True or false: to stay away from pylons is safe. (a) False (b) True
14. 14.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) one bulb out, all go out (d) own switch for each bulb
15. 15.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) to make them heavy (d) plastic is an insulator
16. 16.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
17. 17.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
18. 18.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
19. 19.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
20. 20.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
21. 21.💡 2 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
22. 22.Which drawing is the symbol for a cell? (a) many long-short pairs (b) two or more cell symbols (c) one tall, one short bar (d) triangle against a bar
23. 23.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they all go out (c) they get dimmer (d) they explode
24. 24.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔦 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
26. 26.True or false: a circle with M inside is the symbol for a diode. (a) False (b) True
27. 27.True or false: a line lifted at a gap is the symbol for a switch. (a) True (b) False
28. 28.Which of these uses electricity? (a) a bicycle dynamo (b) a solar panel (c) a battery (d) a washing machine
29. 29.Which of these means the circuit is closed? (a) the switch is OFF (b) a wire is cut (c) the loop is complete (d) the bulb is unscrewed
30. 30.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) battery (b) bulb (c) resistor (d) junction
31. 31.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
32. 32.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
33. 33.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 15 V (c) 230 V (d) 0.5 V
34. 34.🔍 Which is the odd one out? (a) use mains for a project (b) touch a switch when wet (c) keep drinks far away (d) touch a fallen wire
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) switch (b) battery (c) ammeter (d) bulb
36. 36.Which drawing is the symbol for a switch? (a) two equal parallel lines (b) a straight line (c) a small empty box (d) a line lifted at a gap
37. 37.Which of these is an insulator? (a) a graphite rod (b) a steel coin (c) a glass marble (d) a safety pin
38. 38.🔦 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 steel spoon. Does the bulb glow? (a) No (b) Yes
39. 39.💡 3 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
40. 40.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?

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