Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 249 · 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: a street light mainly gives out heat. (a) True (b) False
2. 2.💡 5 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. Bulb 4 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
3. 3.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
4. 4.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
5. 5.Which of these is not safe? (a) take cells out after use (b) fly kites in open fields (c) dry your hands first (d) use mains for a project
6. 6.💡 In a series circuit, how many paths does the current have? (a) two (b) none (c) one for each bulb (d) one
7. 7.True or false: an LED lamp mainly makes sound. (a) False (b) True
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
9. 9.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
10. 10.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) never (d) only when both are ON
11. 11.🔦 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 dry cork. Does the bulb glow? (a) No (b) Yes
12. 12.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 9 V (c) 230 V (d) 1.5 V
13. 13.Which of these is true of a series circuit? (a) own switch for each bulb (b) a single current path (c) each gets the full volts (d) many paths for current
14. 14.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
15. 15.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
16. 16.True or false: a safety pin is an insulator. (a) True (b) False
17. 17.True or false: a line lifted at a gap is the symbol for a bulb. (a) True (b) False
18. 18.💡 5 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. Bulb 1 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
19. 19.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
20. 20.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
21. 21.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
22. 22.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) not joined (d) by Wi-Fi
23. 23.💡 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. Bulb 1 is taken out of its holder. How many bulbs glow?
24. 24.Which drawing is the symbol for a cell? (a) a small empty box (b) a plain rectangle (c) many long-short pairs (d) one tall, one short bar
25. 25.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
26. 26.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a complete loop (d) a broken path
27. 27.Which of these uses electricity? (a) a generator (b) a battery (c) a computer (d) a power station
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) No (b) Yes
29. 29.⚡ What does a night lamp mainly change electricity into? (a) movement (b) heat (c) sound (d) light
30. 30.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.⚡ What does an electric toy car mainly change electricity into? (a) movement (b) light (c) heat (d) sound
33. 33.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
34. 34.🔘 What does a switch do in a circuit? (a) stores current (b) makes electricity (c) opens or closes the loop (d) changes the voltage
35. 35.⚡ What does a doorbell mainly change electricity into? (a) sound (b) heat (c) movement (d) light
36. 36.🔍 Which is the odd one out? (a) a safety pin (b) a paper strip (c) a plastic ruler (d) a wooden stick
37. 37.Which of these is an insulator? (a) a wooden stick (b) a metal paper clip (c) a steel coin (d) a steel spoon
38. 38.🔁 Is the circuit closed or open if the loop is complete? (a) open (b) closed
39. 39.True or false: a slide switch stays where you flip it. (a) False (b) True
40. 40.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)

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