Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 261 · 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: many long-short pairs is the symbol for a battery. (a) False (b) True
2. 2.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
3. 3.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) the same voltage (d) no voltage
4. 4.🔍 Which is the odd one out? (a) a ceramic cup (b) a metal paper clip (c) a rubber band (d) a plastic straw
5. 5.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
6. 6.🔌 Is a woollen thread a conductor or an insulator? (a) an insulator (b) a conductor
7. 7.🔍 Which is the odd one out? (a) use a cable with cuts (b) take cells out after use (c) fly kites in open fields (d) keep drinks far away
8. 8.True or false: a toggle switch stays where you flip it. (a) False (b) True
9. 9.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
10. 10.🔍 Which is the odd one out? (a) a rubber band (b) a graphite rod (c) a ceramic cup (d) a rubber eraser
11. 11.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
12. 12.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
13. 13.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
14. 14.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a series circuit (d) a closed circuit
15. 15.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
16. 16.🔌 Is a glass marble a conductor or an insulator? (a) a conductor (b) an insulator
17. 17.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
18. 18.💡 3 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
19. 19.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
20. 20.🔘 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 ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
21. 21.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
22. 22.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
23. 23.True or false: a straight line is the symbol for a wire. (a) True (b) False
24. 24.🔁 What must there be for a current to flow? (a) a complete loop (b) a plastic gap (c) one loose end (d) a broken path
25. 25.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) Yes (b) No
26. 26.Which of these gives us electricity? (a) a cell (b) a television (c) an air conditioner (d) a refrigerator
27. 27.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
28. 28.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
29. 29.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
30. 30.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) battery (b) motor (c) capacitor (d) resistor
31. 31.Which of these is safe? (a) take cells out after use (b) throw cells in a fire (c) touch a switch when wet (d) fly a kite near wires
32. 32.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) a wire is cut (d) all wires are joined
33. 33.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) electrons (d) water drops
34. 34.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
35. 35.True or false: a steel spoon is an insulator. (a) True (b) False
36. 36.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) cut them open (d) bury them in soil
37. 37.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
38. 38.Which of these is not safe? (a) build with an adult near (b) use small battery cells (c) fly kites in open fields (d) climb an electric pole
39. 39.🔋 4 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)? =
40. 40.🔍 Which is the odd one out? (a) open a phone charger (b) use small battery cells (c) stop if a part gets hot (d) build with an adult near

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