Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 175 · 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.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
2. 2.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
3. 3.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) keep drinks far away (d) touch a switch when wet
4. 4.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
5. 5.What does a toggle switch do? (a) slides side to side (b) stays where you flip it (c) closes when tipped over (d) works only while pressed
6. 6.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
7. 7.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
8. 8.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
9. 9.🔋 Does a bicycle dynamo give electricity or use electricity? (a) gives electricity (b) uses electricity
10. 10.Which of these is true of a series circuit? (a) each gets the full volts (b) one bulb out, all go out (c) own switch for each bulb (d) many paths for current
11. 11.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
12. 12.Which drawing is the symbol for a resistor? (a) a straight line (b) a plain rectangle (c) a long and a short line (d) a circle with an X in it
13. 13.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
14. 14.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a smaller voltage (d) a bigger voltage
15. 15.Which drawing is the symbol for a motor? (a) a circle with M inside (b) two equal parallel lines (c) triangle against a bar (d) a long and a short line
16. 16.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
17. 17.Which drawing is the symbol for a battery? (a) one tall, one short bar (b) a circle with V inside (c) a straight line (d) two or more cell symbols
18. 18.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
19. 19.Which of these is an insulator? (a) a steel spoon (b) aluminium foil (c) a rubber band (d) an iron nail
20. 20.True or false: a toaster mainly gives out heat. (a) True (b) False
21. 21.💡 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. All the bulbs are in place. How many bulbs glow?
22. 22.Which of these is safe? (a) touch a fallen wire (b) fly a kite near wires (c) open a phone charger (d) fly kites in open fields
23. 23.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a mains extension board (d) a small battery pack
24. 24.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) double the voltage (d) the same voltage
25. 25.True or false: a push button springs back when let go. (a) True (b) False
26. 26.Which drawing is the symbol for a switch? (a) a long and a short line (b) a line lifted at a gap (c) a circle with V inside (d) a circle with a cross
27. 27.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
28. 28.🔁 Is the circuit closed or open if a wire has come loose? (a) open (b) closed
29. 29.🔗 Series or parallel circuit: “each gets the full volts”? (a) parallel (b) series
30. 30.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) one out, the rest glow (d) a single current path
31. 31.🔦 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) Yes (b) No
32. 32.Which of these is true of a parallel circuit? (a) a single current path (b) one bulb out, all go out (c) a break stops every bulb (d) each gets the full volts
33. 33.True or false: a line lifted at a gap is the symbol for a switch. (a) False (b) True
34. 34.⚡ What does a rice cooker mainly change electricity into? (a) light (b) sound (c) movement (d) heat
35. 35.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) sound energy (d) nuclear energy
36. 36.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.True or false: a plastic ruler is an insulator. (a) False (b) True
39. 39.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
40. 40.🔦 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) No (b) Yes

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