Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 867 · 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.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
2. 2.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
3. 3.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in series (c) not joined (d) in parallel
4. 4.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
5. 5.⚠️ 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) wait and watch (d) shout for an adult
6. 6.🔍 Which is the odd one out? (a) dry your hands first (b) build with an adult near (c) poke things in a socket (d) use small battery cells
7. 7.💡 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
8. 8.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a closed circuit (c) a series circuit (d) a full circuit
9. 9.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
10. 10.Which drawing is the symbol for a cell? (a) a circle with A inside (b) a straight line (c) triangle against a bar (d) a long and a short line
11. 11.🔘 A bulb and a cell are joined through 4 switches on 4 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?
12. 12.True or false: “each gets the full volts” is true of a series circuit. (a) True (b) False
13. 13.True or false: a reed switch springs back when let go. (a) False (b) True
14. 14.What does a toggle switch do? (a) slides side to side (b) flips up or down (c) closes when tipped over (d) closes near a magnet
15. 15.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) capacitor (b) wire (c) resistor (d) cell
16. 16.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) LED (b) bulb (c) resistor (d) diode
17. 17.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
18. 18.Which drawing is the symbol for a capacitor? (a) one tall, one short bar (b) a straight line (c) two equal parallel lines (d) a long and a short line
19. 19.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
20. 20.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
21. 21.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
22. 22.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
23. 23.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is OFF (c) the bulb is unscrewed (d) all wires are joined
24. 24.True or false: a night lamp mainly gives out light. (a) True (b) False
25. 25.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) a smaller voltage (c) the same voltage (d) no voltage
26. 26.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) nobody (c) a younger child (d) a trusted adult
27. 27.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) chemical energy (c) light energy (d) sound energy
28. 28.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.True or false: “each gets the full volts” is true of a parallel circuit. (a) False (b) True
30. 30.🔋 What should you do with used-up cells? (a) cut them open (b) throw them in a fire (c) give them for recycling (d) bury them in soil
31. 31.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
32. 32.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
33. 33.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
35. 35.🔍 Which is the odd one out? (a) touch a switch when wet (b) fly a kite near wires (c) stay away from pylons (d) use a cable with cuts
36. 36.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
37. 37.True or false: a safety pin is a conductor. (a) False (b) True
38. 38.💡 5 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
39. 39.Which of these gives us electricity? (a) a water pump (b) a power station (c) a computer (d) a mobile phone
40. 40.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes

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