Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 133 · 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 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
2. 2.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
3. 3.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) diode (b) bulb (c) switch (d) wire
4. 4.Which of these is not safe? (a) dry your hands first (b) climb an electric pole (c) build with an adult near (d) use small battery cells
5. 5.Which of these is an insulator? (a) a rubber band (b) a brass key (c) a safety pin (d) an iron nail
6. 6.⚡ What does a mixer grinder mainly change electricity into? (a) movement (b) sound (c) light (d) heat
7. 7.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) light energy (c) chemical energy (d) sound energy
8. 8.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a younger child (c) a trusted adult (d) nobody
9. 9.🔘 A bulb and a cell are joined through 5 switches on 5 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?
10. 10.🔘 Which kind of switch slides side to side? (a) a tilt switch (b) a slide switch (c) a push button (d) a reed switch
11. 11.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) bulbs share the voltage (c) a single current path (d) own switch for each bulb
12. 12.🔍 Which is the odd one out? (a) climb an electric pole (b) touch a switch when wet (c) open a phone charger (d) keep drinks far away
13. 13.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
14. 14.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) keep drinks far away (b) touch a fallen wire (c) build with an adult near (d) use small battery cells
16. 16.🔌 Most metals are good … (a) batteries (b) magnets only (c) insulators (d) conductors
17. 17.🔦 A circuit has a new 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 metal paper clip. Does the bulb glow? (a) No (b) Yes
18. 18.🔍 Which is the odd one out? (a) a safety pin (b) a metal paper clip (c) a dry cork (d) an iron nail
19. 19.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
20. 20.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
21. 21.True or false: a school bell mainly gives out heat. (a) False (b) True
22. 22.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
23. 23.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) an exhaust fan (b) an electric toy car (c) a mixer grinder (d) an electric kettle
25. 25.What does a toggle switch do? (a) works only while pressed (b) closes when tipped over (c) springs back when let go (d) stays where you flip it
26. 26.True or false: to poke things in a socket is safe. (a) True (b) False
27. 27.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
28. 28.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes
29. 29.🔦 A circuit has a new 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 paper strip. Does the bulb glow? (a) Yes (b) No
30. 30.🔍 Which is the odd one out? (a) an LED lamp (b) a tube light (c) a street light (d) a mixer grinder
31. 31.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
32. 32.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 2 glow? (a) No (b) Yes
33. 33.Which of these is true of a series circuit? (a) used in house wiring (b) a single current path (c) many paths for current (d) each gets the full volts
34. 34.🔦 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) No (b) Yes
35. 35.What does a tilt switch do? (a) springs back when let go (b) stays where you flip it (c) closes when tipped over (d) works only while pressed
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) No (b) Yes
37. 37.True or false: to use a cable with cuts is not safe. (a) True (b) False
38. 38.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
39. 39.Which of these gives us electricity? (a) a computer (b) a water pump (c) a washing machine (d) a battery
40. 40.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe

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