Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 719 · 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.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
2. 2.Which of these is an insulator? (a) a metal paper clip (b) a graphite rod (c) a steel spoon (d) a rubber eraser
3. 3.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
4. 4.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a complete loop (d) a broken path
5. 5.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) LED (b) diode (c) motor (d) bulb
6. 6.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic makes current (d) plastic is a conductor
7. 7.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a conductor (c) a cell (d) a switch that is ON
8. 8.Which of these means the circuit is open? (a) a wire has come loose (b) the switch is ON (c) all wires are joined (d) the loop is complete
9. 9.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) it does not matter (c) only one (d) both of them
10. 10.Which of these is safe? (a) stay away from pylons (b) poke things in a socket (c) open a phone charger (d) fly a kite near wires
11. 11.True or false: to stay away from pylons is not safe. (a) False (b) True
12. 12.Which of these mainly gives out light? (a) a night lamp (b) a doorbell (c) an electric drill (d) a school bell
13. 13.True or false: to open a phone charger is not safe. (a) True (b) False
14. 14.Which drawing is the symbol for a resistor? (a) a straight line (b) two equal parallel lines (c) a line lifted at a gap (d) a small empty box
15. 15.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
16. 16.Which of these is not safe? (a) use small battery cells (b) open a phone charger (c) stay away from pylons (d) fly kites in open fields
17. 17.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) pull them by the hand (c) shout for an adult (d) wait and watch
18. 18.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.Which of these mainly gives out light? (a) a siren (b) a tube light (c) a room heater (d) a loudspeaker
20. 20.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) an exhaust fan (b) an electric drill (c) an LED lamp (d) a ceiling fan
22. 22.True or false: a plain rectangle is the symbol for a resistor. (a) True (b) False
23. 23.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) switch (c) ammeter (d) capacitor
24. 24.🔍 Which is the odd one out? (a) a rubber band (b) a rubber eraser (c) a woollen thread (d) a copper wire
25. 25.Which drawing is the symbol for a capacitor? (a) many long-short pairs (b) a circle with an X in it (c) two equal parallel lines (d) a long and a short line
26. 26.True or false: a toggle switch flips up or down. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a loudspeaker (b) a tube light (c) a doorbell (d) a siren
28. 28.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) light energy (c) chemical energy (d) movement energy
29. 29.💡 A battery lights 2 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
30. 30.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they keep glowing (b) they explode (c) they all go out (d) they get dimmer
31. 31.Which of these mainly makes sound? (a) an electric iron (b) a room heater (c) a buzzer (d) an electric drill
32. 32.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
33. 33.True or false: to throw cells in a fire is safe. (a) True (b) False
34. 34.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
35. 35.Which of these is true of a series circuit? (a) own switch for each bulb (b) bulbs share the voltage (c) each gets the full volts (d) many paths for current
36. 36.🔘 Which kind of switch slides side to side? (a) a push button (b) a slide switch (c) a reed switch (d) a toggle switch
37. 37.True or false: a push button slides side to side. (a) False (b) True
38. 38.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
39. 39.Which of these is safe? (a) throw cells in a fire (b) open a phone charger (c) use mains for a project (d) build with an adult near
40. 40.True or false: “many paths for current” is true of a series circuit. (a) True (b) False

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