Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 945 · 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.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
2. 2.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
3. 3.💡 2 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
4. 4.True or false: a toggle switch slides side to side. (a) True (b) False
5. 5.What does a tilt switch do? (a) flips up or down (b) stays where you flip it (c) closes when tipped over (d) springs back when let go
6. 6.🔍 Which is the odd one out? (a) a school bell (b) a loudspeaker (c) an electric kettle (d) a buzzer
7. 7.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) an open circuit (c) a short circuit (d) a parallel circuit
8. 8.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) LED (b) motor (c) resistor (d) junction
9. 9.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
10. 10.Which of these is a conductor? (a) a cotton thread (b) a plastic ruler (c) a brass key (d) a dry cork
11. 11.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
12. 12.🔍 Which is the odd one out? (a) a plastic straw (b) a steel coin (c) a plastic ruler (d) a cotton thread
13. 13.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
14. 14.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
15. 15.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
16. 16.True or false: a doorbell mainly gives out light. (a) True (b) False
17. 17.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a tilt switch (c) a push button (d) a toggle switch
18. 18.Which of these gives us electricity? (a) a refrigerator (b) a television (c) a cell (d) a washing machine
19. 19.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) in parallel (d) not joined
20. 20.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
21. 21.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
22. 22.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) makes electricity (d) stores current
23. 23.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
24. 24.True or false: a toggle switch flips up or down. (a) False (b) True
25. 25.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
26. 26.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) a single current path (c) each gets the full volts (d) bulbs share the voltage
27. 27.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
28. 28.🔦 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
29. 29.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) bulbs share the voltage (c) many paths for current (d) one bulb out, all go out
30. 30.⚠️ Why must we never touch switches with wet hands? (a) it spoils the paint (b) water makes it cold (c) it is just untidy (d) water carries current
31. 31.True or false: to stay away from pylons is not safe. (a) True (b) False
32. 32.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
33. 33.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
34. 34.Which of these means the circuit is open? (a) all wires are joined (b) the bulb is unscrewed (c) the loop is complete (d) the switch is ON
35. 35.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 230 V (d) 15 V
36. 36.True or false: a rubber eraser is an insulator. (a) True (b) False
37. 37.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
38. 38.💡 In a series circuit, how many paths does the current have? (a) none (b) two (c) one for each bulb (d) one
39. 39.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
40. 40.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) used in house wiring (d) a break stops every bulb

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