Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 940 · 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.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) the same voltage (c) no voltage (d) half the voltage
2. 2.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) plastic is a conductor (c) plastic makes current (d) to make them heavy
3. 3.Which of these means the circuit is closed? (a) the switch is OFF (b) all wires are joined (c) a wire has come loose (d) a wire is cut
4. 4.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
5. 5.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) junction (c) bulb (d) voltmeter
6. 6.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the switch is OFF (d) the loop is complete
7. 7.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
8. 8.🔌 Most metals are good … (a) magnets only (b) conductors (c) batteries (d) insulators
9. 9.True or false: an iron nail is a conductor. (a) False (b) True
10. 10.True or false: a tube light mainly makes sound. (a) True (b) False
11. 11.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) junction (b) voltmeter (c) bulb (d) cell
12. 12.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
13. 13.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
14. 14.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a push button (c) a toggle switch (d) a tilt switch
15. 15.True or false: a small empty box is the symbol for a switch. (a) False (b) True
16. 16.🔘 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?
17. 17.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) one (c) none (d) two
18. 18.True or false: to open a phone charger is safe. (a) False (b) True
19. 19.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
20. 20.🔦 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
21. 21.🔌 Which metal is used for most electric wires at home? (a) plastic (b) glass (c) copper (d) rubber
22. 22.🔋 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)? =
23. 23.🔋 5 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
24. 24.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
25. 25.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
26. 26.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
27. 27.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
28. 28.True or false: a school bell mainly makes movement. (a) True (b) False
29. 29.Which of these is true of a series circuit? (a) each gets the full volts (b) many paths for current (c) bulbs share the voltage (d) one out, the rest glow
30. 30.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.Which drawing is the symbol for a cell? (a) a small empty box (b) a straight line (c) triangle against a bar (d) one tall, one short bar
32. 32.What does a toggle switch do? (a) springs back when let go (b) works only while pressed (c) flips up or down (d) closes near a magnet
33. 33.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
34. 34.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) neither line (c) both lines (d) the shorter line
35. 35.True or false: a push button springs back when let go. (a) False (b) True
36. 36.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
37. 37.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
38. 38.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to hide the circuit (c) to make it colourful (d) symbols are heavier
39. 39.True or false: a push button closes near a magnet. (a) True (b) False
40. 40.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) switch (c) LED (d) wire

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