Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 917 · 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 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
2. 2.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) a series circuit (d) an open circuit
3. 3.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
4. 4.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
5. 5.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
6. 6.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
8. 8.🔍 Which is the odd one out? (a) stay away from pylons (b) keep drinks far away (c) take cells out after use (d) use a cable with cuts
9. 9.True or false: a long and a short line is the symbol for a battery. (a) False (b) True
10. 10.What does a push button do? (a) stays where you flip it (b) closes when tipped over (c) springs back when let go (d) closes near a magnet
11. 11.Which of these is true of a series circuit? (a) a single current path (b) used in house wiring (c) many paths for current (d) one out, the rest glow
12. 12.Which of these mainly gives out light? (a) a rice cooker (b) a mixer grinder (c) an LED lamp (d) a doorbell
13. 13.🔍 Which is the odd one out? (a) fly a kite near wires (b) take cells out after use (c) touch a fallen wire (d) open a phone charger
14. 14.True or false: a buzzer mainly gives out light. (a) False (b) True
15. 15.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) never (c) when both are ON (d) when either is ON
16. 16.True or false: to touch a fallen wire is safe. (a) False (b) True
17. 17.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
18. 18.🔍 Which is the odd one out? (a) use small battery cells (b) build with an adult near (c) fly kites in open fields (d) climb an electric pole
19. 19.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
20. 20.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
21. 21.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
22. 22.Which of these gives us electricity? (a) a cell (b) a computer (c) a washing machine (d) a television
23. 23.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
24. 24.🔍 Which is the odd one out? (a) a rice cooker (b) a street light (c) a toaster (d) an electric iron
25. 25.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
26. 26.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
27. 27.True or false: to take cells out after use is safe. (a) True (b) False
28. 28.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
29. 29.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
30. 30.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) Yes (b) No
31. 31.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
32. 32.🔋 Does a solar panel give electricity or use electricity? (a) uses electricity (b) gives electricity
33. 33.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
34. 34.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) a mains extension board (d) an inverter socket
35. 35.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
36. 36.Which of these is true of a parallel circuit? (a) a single current path (b) own switch for each bulb (c) bulbs share the voltage (d) one bulb out, all go out
37. 37.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
38. 38.True or false: to stop if a part gets hot is not safe. (a) True (b) False
39. 39.Which drawing is the symbol for a diode? (a) a dot where wires meet (b) a circle with A inside (c) triangle against a bar (d) one tall, one short bar
40. 40.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) cell (b) bulb (c) junction (d) switch

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