Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 2 · 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.True or false: a line lifted at a gap is the symbol for a diode. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a doorbell (b) a buzzer (c) a school bell (d) an electric kettle
3. 3.🔍 Which is the odd one out? (a) a tube light (b) a street light (c) an LED lamp (d) a doorbell
4. 4.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) bulb (b) battery (c) diode (d) LED
5. 5.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
6. 6.What does a slide switch do? (a) closes when tipped over (b) stays where you flip it (c) slides side to side (d) flips up or down
7. 7.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) straight lines (c) wavy lines (d) dotted circles
8. 8.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the filament (c) the glass (d) the base
9. 9.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
10. 10.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
11. 11.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they keep glowing (d) they all go out
12. 12.Which drawing is the symbol for a motor? (a) a circle with M inside (b) a dot where wires meet (c) a small empty box (d) a circle with a cross
13. 13.Which of these means the circuit is open? (a) a wire has come loose (b) the loop is complete (c) all wires are joined (d) the switch is ON
14. 14.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) both lines (c) neither line (d) the shorter line
17. 17.Which drawing is the symbol for a cell? (a) a circle with A inside (b) a line lifted at a gap (c) a long and a short line (d) two or more cell symbols
18. 18.🔍 Which is the odd one out? (a) an electric drill (b) a mixer grinder (c) a water heater (d) a table fan
19. 19.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
20. 20.Which of these is a conductor? (a) a dry cork (b) a rubber band (c) a paper strip (d) a graphite rod
21. 21.What does a toggle switch do? (a) works only while pressed (b) slides side to side (c) closes when tipped over (d) stays where you flip it
22. 22.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) both of them (c) only one (d) none
23. 23.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
24. 24.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
25. 25.💡 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 4 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
26. 26.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
27. 27.Which drawing is the symbol for a battery? (a) a circle with V inside (b) a dot where wires meet (c) many long-short pairs (d) a line lifted at a gap
28. 28.True or false: a slide switch slides side to side. (a) True (b) False
29. 29.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
30. 30.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in parallel (d) in series
31. 31.💡 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
32. 32.⚡ What does a street light mainly change electricity into? (a) movement (b) sound (c) light (d) heat
33. 33.True or false: a push button springs back when let go. (a) True (b) False
34. 34.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
35. 35.🔋 How many 2 V cells must be joined in series to give 4 V?
36. 36.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
37. 37.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) one single wire (d) a kind of bulb
38. 38.Which of these uses electricity? (a) a power station (b) an air conditioner (c) a generator (d) a wind turbine
39. 39.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a switch that is ON (c) a cell (d) a conductor
40. 40.Which of these is a conductor? (a) a glass marble (b) an iron nail (c) a cotton thread (d) a rubber eraser

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