Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 904 · 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.Which drawing is the symbol for a cell? (a) a circle with V inside (b) a long and a short line (c) a circle with a cross (d) a straight line
2. 2.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
3. 3.Which drawing is the symbol for a wire? (a) a straight line (b) two or more cell symbols (c) a small empty box (d) a circle with V inside
4. 4.🔦 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
5. 5.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) wire (b) motor (c) ammeter (d) cell
6. 6.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
7. 7.True or false: to poke things in a socket is safe. (a) False (b) True
8. 8.⚡ What does a room heater mainly change electricity into? (a) movement (b) heat (c) light (d) sound
9. 9.🔍 Which is the odd one out? (a) a night lamp (b) an LED lamp (c) a torch (d) a loudspeaker
10. 10.🔍 Which is the odd one out? (a) fly kites in open fields (b) stay away from pylons (c) build with an adult near (d) use mains for a project
11. 11.💡 5 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
12. 12.Which of these mainly gives out heat? (a) a siren (b) a buzzer (c) a night lamp (d) a rice cooker
13. 13.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
14. 14.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
15. 15.💡 6 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulbs 2 and 5 are taken out of their holders. How many bulbs glow?
16. 16.🔘 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) Yes (b) No
17. 17.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
18. 18.Which of these is not safe? (a) keep drinks far away (b) build with an adult near (c) poke things in a socket (d) take cells out after use
19. 19.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
20. 20.Which of these mainly gives out light? (a) a street light (b) an exhaust fan (c) a water heater (d) a school bell
21. 21.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) switch (b) diode (c) cell (d) voltmeter
22. 22.🔘 Which kind of switch slides side to side? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a slide switch
23. 23.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a short circuit (c) a parallel circuit (d) a safe circuit
25. 25.💡 4 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
26. 26.Which of these is not safe? (a) keep drinks far away (b) stop if a part gets hot (c) take cells out after use (d) touch a switch when wet
27. 27.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
28. 28.Which of these gives us electricity? (a) an air conditioner (b) a television (c) a bicycle dynamo (d) a computer
29. 29.True or false: an electric kettle mainly gives out heat. (a) True (b) False
30. 30.🔘 Which kind of switch stays where you flip it? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
31. 31.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a paper strip. Does the bulb glow? (a) Yes (b) No
32. 32.🔍 Which is the odd one out? (a) use small battery cells (b) climb an electric pole (c) fly a kite near wires (d) throw cells in a fire
33. 33.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) none (d) both of them
34. 34.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) to hide the circuit (c) to make it colourful (d) symbols are heavier
35. 35.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) the bulb is unscrewed (d) all wires are joined
36. 36.🔦 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 woollen thread. Does the bulb glow? (a) No (b) Yes
37. 37.Which of these is safe? (a) keep drinks far away (b) climb an electric pole (c) fly a kite near wires (d) poke things in a socket
38. 38.True or false: a dry cork is an insulator. (a) False (b) True
39. 39.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) Yes (b) No

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