Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 222 · 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 circuit diagram, which part is drawn as many long-short pairs? (a) bulb (b) LED (c) switch (d) battery
2. 2.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) little stars (c) straight lines (d) wavy lines
3. 3.True or false: “a break stops every bulb” is true of a parallel circuit. (a) True (b) False
4. 4.True or false: a school bell mainly makes sound. (a) True (b) False
5. 5.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) symbols are heavier (d) quick and clear for all
6. 6.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
7. 7.🔦 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) No (b) Yes
8. 8.True or false: a paper strip is a conductor. (a) False (b) True
9. 9.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
10. 10.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
11. 11.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the glass (c) the filament (d) the base
12. 12.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
13. 13.True or false: a toggle switch springs back when let go. (a) True (b) False
14. 14.Which of these gives us electricity? (a) an air conditioner (b) a television (c) a bicycle dynamo (d) a washing machine
15. 15.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in parallel (d) in series
16. 16.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a trusted adult (c) a younger child (d) a stranger online
17. 17.True or false: a slide switch closes near a magnet. (a) False (b) True
18. 18.Which of these means the circuit is open? (a) the switch is ON (b) the bulb is unscrewed (c) all wires are joined (d) the loop is complete
19. 19.Which of these uses electricity? (a) a solar panel (b) a bicycle dynamo (c) a water pump (d) a wind turbine
20. 20.🔍 Which is the odd one out? (a) a rubber eraser (b) a dry cork (c) a brass key (d) a wooden stick
21. 21.What does a reed switch do? (a) flips up or down (b) closes near a magnet (c) slides side to side (d) stays where you flip it
22. 22.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
23. 23.Which of these uses electricity? (a) a computer (b) a cell (c) a solar panel (d) a power station
24. 24.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) it does not matter (d) both of them
25. 25.Which drawing is the symbol for an LED? (a) triangle, bar and arrows (b) two equal parallel lines (c) a long and a short line (d) a circle with A inside
26. 26.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) broken (d) closed
27. 27.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
28. 28.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) an open circuit (c) a series circuit (d) a closed circuit
29. 29.🔍 Which is the odd one out? (a) a glass marble (b) a rubber band (c) aluminium foil (d) a dry cork
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a metal paper clip across the gap. Does the bulb glow? (a) Yes (b) No
31. 31.🔍 Which is the odd one out? (a) a traffic signal (b) an electric drill (c) a street light (d) a tube light
32. 32.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) junction (b) bulb (c) battery (d) wire
33. 33.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
34. 34.💡 6 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 5 is taken out of its holder. How many bulbs glow?
35. 35.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
36. 36.🔦 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) No (b) Yes
37. 37.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) shout for an adult (c) pull them by the hand (d) pour water on them
38. 38.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 9 V (c) 230 V (d) 1.5 V
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) both lines (d) neither line
40. 40.🔋 3 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)? =

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