Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 822 · 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 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
2. 2.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) broken (d) cut
3. 3.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
4. 4.⚡ What does an LED lamp mainly change electricity into? (a) heat (b) movement (c) light (d) sound
5. 5.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
6. 6.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
7. 7.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) dust particles (c) electrons (d) photons
8. 8.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
9. 9.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) wire (c) switch (d) diode
10. 10.True or false: a ceiling fan mainly gives out heat. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) stop if a part gets hot (b) throw cells in a fire (c) climb an electric pole (d) open a phone charger
12. 12.Which of these is true of a series circuit? (a) own switch for each bulb (b) a break stops every bulb (c) used in house wiring (d) each gets the full volts
13. 13.💡 In a series circuit, how many paths does the current have? (a) none (b) one (c) two (d) one for each bulb
14. 14.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) to make them heavy (c) plastic is an insulator (d) plastic is a conductor
15. 15.Which of these mainly makes movement? (a) a school bell (b) a mixer grinder (c) a tube light (d) a water heater
16. 16.⚡ What does a rice cooker mainly change electricity into? (a) sound (b) heat (c) light (d) movement
17. 17.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
18. 18.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they get dimmer (d) they all go out
20. 20.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
21. 21.True or false: “many paths for current” is true of a series circuit. (a) False (b) True
22. 22.Which of these is not safe? (a) take cells out after use (b) touch a fallen wire (c) stay away from pylons (d) keep drinks far away
23. 23.What does a toggle switch do? (a) stays where you flip it (b) springs back when let go (c) slides side to side (d) works only while pressed
24. 24.⚠️ Is it safe to stay away from pylons? (a) safe (b) not safe
25. 25.💡 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?
26. 26.💡 2 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
27. 27.💡 4 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?
28. 28.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
29. 29.Which of these is not safe? (a) keep drinks far away (b) fly kites in open fields (c) stay away from pylons (d) touch a switch when wet
30. 30.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
31. 31.🔋 What is a battery? (a) two or more cells joined (b) a kind of bulb (c) a switch with a lid (d) one single wire
32. 32.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) wavy lines (d) dotted circles
33. 33.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) an iron nail (b) a rubber band (c) a glass marble (d) a rubber eraser
35. 35.Which drawing is the symbol for a diode? (a) triangle against a bar (b) a small empty box (c) a circle with an X in it (d) two or more cell symbols
36. 36.⚠️ Is it safe to build with an adult near? (a) safe (b) not safe
37. 37.True or false: to open a phone charger is not safe. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) a tube light (b) a school bell (c) a siren (d) a loudspeaker
39. 39.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
40. 40.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) one out, the rest glow (d) bulbs share the voltage

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