Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 985 · 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 series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
2. 2.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
3. 3.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
4. 4.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) bulbs share the voltage (d) each gets the full volts
5. 5.True or false: a toaster mainly makes movement. (a) False (b) True
6. 6.🔘 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 ON and C is ON. Does the bulb glow? (a) No (b) Yes
7. 7.🔍 Which is the odd one out? (a) a buzzer (b) a siren (c) a rice cooker (d) a school bell
8. 8.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
9. 9.🔋 6 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
10. 10.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
11. 11.True or false: to climb an electric pole is safe. (a) True (b) False
12. 12.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) all wires are joined (d) the switch is OFF
13. 13.True or false: to fly kites in open fields is not safe. (a) False (b) True
14. 14.Which drawing is the symbol for a battery? (a) triangle against a bar (b) two or more cell symbols (c) a dot where wires meet (d) a long and a short line
15. 15.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
16. 16.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) the bulb is unscrewed
18. 18.True or false: to take cells out after use is not safe. (a) True (b) False
19. 19.💡 4 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 3 glow? (a) No (b) Yes
20. 20.True or false: if a wire has come loose, the circuit is closed and current flows. (a) True (b) False
21. 21.True or false: a glass marble is an insulator. (a) False (b) True
22. 22.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) water makes it cold (c) it is just untidy (d) it spoils the paint
23. 23.🔌 Which metal is used for most electric wires at home? (a) rubber (b) plastic (c) glass (d) copper
24. 24.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
25. 25.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) symbols are heavier (c) quick and clear for all (d) to hide the circuit
26. 26.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) the loop is complete (d) the switch is OFF
27. 27.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) a steel coin (b) a paper strip (c) an iron nail (d) a copper wire
29. 29.What does a tilt switch do? (a) closes when tipped over (b) closes near a magnet (c) works only while pressed (d) springs back when let go
30. 30.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.🔍 Which is the odd one out? (a) a glass marble (b) a dry cork (c) a metal paper clip (d) a cotton thread
32. 32.🔋 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
33. 33.🔍 Which is the odd one out? (a) a loudspeaker (b) a siren (c) a street light (d) a school bell
34. 34.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic makes current (c) plastic is a conductor (d) plastic is an insulator
35. 35.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) ammeter (b) capacitor (c) motor (d) battery
36. 36.True or false: a woollen thread is an insulator. (a) True (b) False
37. 37.🔋 2 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
38. 38.True or false: a night lamp mainly gives out heat. (a) False (b) True
39. 39.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
40. 40.Which drawing is the symbol for a switch? (a) many long-short pairs (b) a long and a short line (c) a circle with M inside (d) a line lifted at a gap

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