Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 954 · 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.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
2. 2.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
3. 3.🔦 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 rubber eraser. Does the bulb glow? (a) No (b) Yes
4. 4.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) light energy (c) sound energy (d) wind energy
5. 5.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) capacitor (b) junction (c) battery (d) wire
6. 6.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
7. 7.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
8. 8.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) triangle against a bar (c) a small empty box (d) a plain rectangle
9. 9.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) wait and watch (d) pull them by the hand
10. 10.🔦 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
11. 11.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) sound energy (c) light energy (d) chemical energy
12. 12.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
13. 13.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in series (d) in parallel
14. 14.Which of these is true of a series circuit? (a) used in house wiring (b) many paths for current (c) one bulb out, all go out (d) each gets the full volts
15. 15.🔌 A gap of dry air between two wires acts as … (a) a conductor (b) a cell (c) a switch that is ON (d) an insulator
16. 16.Which of these is safe? (a) open a phone charger (b) touch a fallen wire (c) fly kites in open fields (d) use mains for a project
17. 17.Which drawing is the symbol for a capacitor? (a) two or more cell symbols (b) a long and a short line (c) a plain rectangle (d) two equal parallel lines
18. 18.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) diode (b) wire (c) resistor (d) voltmeter
19. 19.🔍 Which is the odd one out? (a) a brass key (b) a steel coin (c) a metal paper clip (d) a wooden stick
20. 20.True or false: if a wire is cut, the circuit is closed and current flows. (a) False (b) True
21. 21.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
22. 22.Which of these is safe? (a) poke things in a socket (b) touch a fallen wire (c) climb an electric pole (d) take cells out after use
23. 23.Which of these is an insulator? (a) a safety pin (b) a copper wire (c) a plastic straw (d) a brass key
24. 24.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) one loose end (d) a complete loop
25. 25.🔍 Which is the odd one out? (a) a school bell (b) a rice cooker (c) a loudspeaker (d) a buzzer
26. 26.Which of these is not safe? (a) fly kites in open fields (b) touch a switch when wet (c) build with an adult near (d) dry your hands first
27. 27.💡 In a series circuit, how many paths does the current have? (a) one (b) one for each bulb (c) two (d) none
28. 28.🔍 Which is the odd one out? (a) take cells out after use (b) touch a fallen wire (c) fly kites in open fields (d) stay away from pylons
29. 29.Which of these is safe? (a) use mains for a project (b) stop if a part gets hot (c) open a phone charger (d) fly a kite near wires
30. 30.💡 4 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
31. 31.💡 5 identical bulbs are joined in parallel across a 6 V battery (ideal wires). How many volts does each bulb get? =
32. 32.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are OFF (c) only when both are ON (d) never
33. 33.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
34. 34.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) wind energy (c) nuclear energy (d) electrical energy
35. 35.True or false: a rice cooker mainly gives out heat. (a) False (b) True
36. 36.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
37. 37.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) an open circuit (d) a safe circuit
38. 38.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
39. 39.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
40. 40.True or false: a tilt switch slides side to side. (a) True (b) False

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