Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 964 · 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.🔦 A circuit has a used-up (dead) 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 plastic straw. Does the bulb glow? (a) Yes (b) No
2. 2.Which of these gives us electricity? (a) a computer (b) a refrigerator (c) a mobile phone (d) a solar panel
3. 3.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
4. 4.True or false: “a single current path” is true of a series circuit. (a) False (b) True
5. 5.💡 2 identical bulbs are joined in series with a 2 V battery (ideal wires). How many volts does each bulb get? =
6. 6.Which drawing is the symbol for an ammeter? (a) a plain rectangle (b) a long and a short line (c) triangle, bar and arrows (d) a circle with A inside
7. 7.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
8. 8.True or false: two equal parallel lines is the symbol for a capacitor. (a) True (b) False
9. 9.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) a smaller voltage (c) no voltage (d) the same voltage
10. 10.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
11. 11.Which of these is safe? (a) use small battery cells (b) use mains for a project (c) poke things in a socket (d) open a phone charger
12. 12.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.🔍 Which is the odd one out? (a) an iron nail (b) a plastic straw (c) a dry cork (d) a ceramic cup
14. 14.True or false: a mixer grinder mainly makes sound. (a) False (b) True
15. 15.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the bulb is unscrewed (d) the loop is complete
16. 16.🔌 Is a dry cork a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.Which of these mainly gives out heat? (a) an electric drill (b) a mixer grinder (c) a doorbell (d) a rice cooker
18. 18.What does a reed switch do? (a) works only while pressed (b) stays where you flip it (c) closes near a magnet (d) slides side to side
19. 19.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) light energy (c) sound energy (d) chemical energy
20. 20.What does a tilt switch do? (a) works only while pressed (b) springs back when let go (c) closes when tipped over (d) slides side to side
21. 21.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) switch (b) diode (c) resistor (d) battery
22. 22.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
23. 23.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
24. 24.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
25. 25.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) so all go off together (d) each gets full voltage
26. 26.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a mains extension board (d) a wall socket
27. 27.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
28. 28.⚡ What does an exhaust fan mainly change electricity into? (a) light (b) heat (c) movement (d) sound
29. 29.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
30. 30.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic ruler across the gap. Does the bulb glow? (a) Yes (b) No
32. 32.Which of these uses electricity? (a) a wind turbine (b) a cell (c) an air conditioner (d) a solar panel
33. 33.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
34. 34.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
36. 36.True or false: if a wire has come loose, the circuit is open and no current flows. (a) False (b) True
37. 37.Which of these is true of a series circuit? (a) each gets the full volts (b) a break stops every bulb (c) many paths for current (d) used in house wiring
38. 38.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
39. 39.True or false: to fly a kite near wires is not safe. (a) False (b) True
40. 40.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) junction (b) voltmeter (c) bulb (d) battery

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