Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 871 · 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.⚡ What does a siren mainly change electricity into? (a) light (b) movement (c) sound (d) heat
2. 2.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
3. 3.💡 3 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
4. 4.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they explode (d) they get dimmer
5. 5.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
6. 6.💡 3 identical bulbs are joined in series with a 9 V battery (ideal wires). How many volts does each bulb get? =
7. 7.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a push button (c) a slide switch (d) a tilt switch
8. 8.Which of these mainly makes movement? (a) a school bell (b) a rice cooker (c) a table fan (d) a toaster
9. 9.🔍 Which is the odd one out? (a) use small battery cells (b) use a cable with cuts (c) fly kites in open fields (d) stay away from pylons
10. 10.🔍 Which is the odd one out? (a) dry your hands first (b) use small battery cells (c) poke things in a socket (d) stop if a part gets hot
11. 11.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
12. 12.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
13. 13.True or false: a steel spoon is a conductor. (a) False (b) True
14. 14.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
15. 15.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) none (c) it does not matter (d) both of them
16. 16.Which of these mainly makes sound? (a) a water heater (b) a buzzer (c) a ceiling fan (d) a traffic signal
17. 17.Which of these is a conductor? (a) a wooden stick (b) a rubber band (c) a ceramic cup (d) a metal paper clip
18. 18.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
19. 19.True or false: a tube light mainly gives out light. (a) False (b) True
20. 20.Which of these is an insulator? (a) a rubber band (b) a copper wire (c) a brass key (d) a steel spoon
21. 21.True or false: a reed switch closes near a magnet. (a) True (b) False
22. 22.True or false: two or more cell symbols is the symbol for a battery. (a) True (b) False
23. 23.Which of these mainly makes sound? (a) an electric drill (b) a ceiling fan (c) an electric kettle (d) a school bell
24. 24.💡 3 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 1 and 3 are taken out of their holders. How many bulbs glow?
25. 25.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.🔘 A bulb and a cell are joined through 6 switches on 6 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
27. 27.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
28. 28.Which of these is an insulator? (a) a ceramic cup (b) a copper wire (c) a graphite rod (d) a steel spoon
29. 29.⚡ What does an electric iron mainly change electricity into? (a) light (b) sound (c) movement (d) heat
30. 30.What does a toggle switch do? (a) flips up or down (b) closes near a magnet (c) works only while pressed (d) springs back when let go
31. 31.Which of these gives us electricity? (a) a refrigerator (b) a computer (c) an air conditioner (d) a wind turbine
32. 32.🔘 When a switch is ON, the circuit is … (a) cut (b) closed (c) open (d) broken
33. 33.True or false: a push button flips up or down. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) dry your hands first (b) throw cells in a fire (c) open a phone charger (d) touch a switch when wet
35. 35.🔌 A gap of dry air between two wires acts as … (a) a cell (b) an insulator (c) a switch that is ON (d) a conductor
36. 36.True or false: a slide switch stays where you flip it. (a) True (b) False
37. 37.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
38. 38.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
39. 39.True or false: to touch a switch when wet is safe. (a) False (b) True
40. 40.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True

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