Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 577 · 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.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) battery (b) capacitor (c) diode (d) resistor
2. 2.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
3. 3.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the switch (d) the filament
4. 4.True or false: a toggle switch flips up or down. (a) True (b) False
5. 5.What does a push button do? (a) works only while pressed (b) slides side to side (c) closes when tipped over (d) stays where you flip it
6. 6.Which drawing is the symbol for a bulb? (a) a plain rectangle (b) a circle with an X in it (c) many long-short pairs (d) a circle with M inside
7. 7.💡 5 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 4 glow? (a) Yes (b) No
8. 8.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
9. 9.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
10. 10.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the bare end (d) the steel shaft
11. 11.💡 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. Bulbs 1 and 2 are taken out of their holders. How many bulbs glow?
12. 12.🔍 Which is the odd one out? (a) a safety pin (b) a brass key (c) a glass marble (d) a copper wire
13. 13.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) an open circuit (c) a safe circuit (d) a parallel circuit
14. 14.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
15. 15.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) used in house wiring (d) one bulb out, all go out
16. 16.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) an open circuit (d) a series circuit
17. 17.🔘 What does a switch do in a circuit? (a) changes the voltage (b) makes electricity (c) opens or closes the loop (d) stores current
18. 18.⚡ What does a mixer grinder mainly change electricity into? (a) sound (b) light (c) movement (d) heat
19. 19.⚡ What does a ceiling fan mainly change electricity into? (a) heat (b) movement (c) sound (d) light
20. 20.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they all go out (d) they get dimmer
22. 22.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) never (c) only when both are ON (d) when either is ON
23. 23.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) in parallel (d) by Wi-Fi
24. 24.Which of these means the circuit is closed? (a) a wire is cut (b) a wire has come loose (c) a cell is taken out (d) the loop is complete
25. 25.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) a steel coin (b) a copper wire (c) a paper strip (d) a graphite rod
27. 27.🔍 Which is the odd one out? (a) touch a fallen wire (b) use mains for a project (c) use small battery cells (d) touch a switch when wet
28. 28.🔍 Which is the odd one out? (a) a school bell (b) a loudspeaker (c) a siren (d) a tube light
29. 29.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) wind energy (d) light energy
30. 30.True or false: to touch a switch when wet is not safe. (a) True (b) False
31. 31.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
33. 33.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
34. 34.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
35. 35.💡 6 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?
36. 36.True or false: a brass key is an insulator. (a) False (b) True
37. 37.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) to make them heavy (c) plastic makes current (d) plastic is an insulator
38. 38.🔘 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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
39. 39.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.Which of these mainly makes sound? (a) a torch (b) a doorbell (c) an electric iron (d) a traffic signal

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