Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 687 · 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 of these is safe? (a) use a cable with cuts (b) climb an electric pole (c) build with an adult near (d) poke things in a socket
2. 2.🔘 Which kind of switch springs back when let go? (a) a reed switch (b) a push button (c) a toggle switch (d) a tilt switch
3. 3.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a small battery pack (c) a wall socket (d) a mains extension board
4. 4.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) one (d) none
5. 5.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) plastic is an insulator (d) to make them heavy
6. 6.Which of these is true of a series circuit? (a) one out, the rest glow (b) used in house wiring (c) each gets the full volts (d) one bulb out, all go out
7. 7.🔍 Which is the odd one out? (a) a traffic signal (b) an LED lamp (c) a water heater (d) a tube light
8. 8.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
9. 9.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
10. 10.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) wire (b) diode (c) bulb (d) battery
11. 11.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) battery (b) switch (c) wire (d) ammeter
12. 12.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
13. 13.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
14. 14.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
15. 15.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) to save copper only (d) so all go off together
16. 16.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
17. 17.True or false: a straight line is the symbol for an LED. (a) False (b) True
18. 18.Which of these is a conductor? (a) a wooden stick (b) a plastic ruler (c) aluminium foil (d) a plastic straw
19. 19.✏️ In a circuit diagram, which part is drawn as a straight line? (a) capacitor (b) motor (c) diode (d) wire
20. 20.🔋 How many 3 V cells must be joined in series to give 21 V?
21. 21.True or false: a long and a short line is the symbol for a motor. (a) False (b) True
22. 22.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
23. 23.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
25. 25.🔘 A bulb and a cell are joined through 4 switches on 4 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
26. 26.🔍 Which is the odd one out? (a) build with an adult near (b) keep drinks far away (c) open a phone charger (d) stop if a part gets hot
27. 27.Which drawing is the symbol for a resistor? (a) a plain rectangle (b) a line lifted at a gap (c) a straight line (d) triangle against a bar
28. 28.🔍 Which is the odd one out? (a) a loudspeaker (b) a siren (c) a school bell (d) an exhaust fan
29. 29.💡 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
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
31. 31.Which drawing is the symbol for an ammeter? (a) a circle with a cross (b) a circle with A inside (c) triangle, bar and arrows (d) two equal parallel lines
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
33. 33.🔁 Is the circuit closed or open if a wire has come loose? (a) closed (b) open
34. 34.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) throw them in a fire (d) cut them open
35. 35.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
36. 36.💡 3 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
37. 37.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.Which of these is not safe? (a) take cells out after use (b) keep drinks far away (c) fly kites in open fields (d) poke things in a socket
39. 39.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
40. 40.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False

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