Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 977 · 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 drawing is the symbol for a cell? (a) a long and a short line (b) a circle with A inside (c) a straight line (d) a circle with M inside
2. 2.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
3. 3.True or false: a rice cooker mainly makes movement. (a) False (b) True
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the shorter line (c) both lines (d) the longer line
5. 5.Which drawing is the symbol for a battery? (a) a circle with A inside (b) triangle, bar and arrows (c) one tall, one short bar (d) two or more cell symbols
6. 6.What does a toggle switch do? (a) springs back when let go (b) works only while pressed (c) closes near a magnet (d) flips up or down
7. 7.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) to make it colourful (c) quick and clear for all (d) symbols are heavier
8. 8.True or false: a dot where wires meet is the symbol for a bulb. (a) True (b) False
9. 9.What does a push button do? (a) stays where you flip it (b) works only while pressed (c) slides side to side (d) closes when tipped over
10. 10.🔍 Which is the odd one out? (a) stay away from pylons (b) touch a switch when wet (c) use small battery cells (d) take cells out after use
11. 11.🔘 When a switch is ON, the circuit is … (a) cut (b) broken (c) closed (d) open
12. 12.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
13. 13.🔦 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
14. 14.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a complete loop (d) a broken path
15. 15.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
16. 16.💡 4 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?
17. 17.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
18. 18.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a push button (c) a tilt switch (d) a slide switch
19. 19.True or false: to build with an adult near is not safe. (a) False (b) True
20. 20.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) the bulb is unscrewed
21. 21.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
22. 22.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
23. 23.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a paper strip. Does the bulb glow? (a) No (b) Yes
24. 24.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
25. 25.True or false: two or more cell symbols is the symbol for a battery. (a) True (b) False
26. 26.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
27. 27.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
28. 28.Which drawing is the symbol for a wire? (a) triangle, bar and arrows (b) a circle with A inside (c) a straight line (d) a circle with V inside
29. 29.🔋 3 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
30. 30.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is ON, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
31. 31.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a reed switch (c) a push button (d) a slide switch
33. 33.Which of these is a conductor? (a) a ceramic cup (b) a rubber eraser (c) a cotton thread (d) a safety pin
34. 34.True or false: to fly a kite near wires is not safe. (a) False (b) True
35. 35.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
36. 36.True or false: a toggle switch flips up or down. (a) True (b) False
37. 37.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) used in house wiring (d) one bulb out, all go out
38. 38.⚡ What does an LED lamp mainly change electricity into? (a) heat (b) sound (c) light (d) movement
39. 39.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) many paths for current (d) a break stops every bulb
40. 40.⚡ What does an electric iron mainly change electricity into? (a) sound (b) heat (c) movement (d) light

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