Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 653 · 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.True or false: two or more cell symbols is the symbol for an ammeter. (a) False (b) True
2. 2.Which of these uses electricity? (a) an air conditioner (b) a wind turbine (c) a solar panel (d) a battery
3. 3.Which of these is not safe? (a) dry your hands first (b) open a phone charger (c) build with an adult near (d) keep drinks far away
4. 4.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
5. 5.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
6. 6.Which of these uses electricity? (a) a solar panel (b) a mobile phone (c) a battery (d) a power station
7. 7.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are ON (c) when both are OFF (d) when either is ON
8. 8.💡 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. Bulb 2 is taken out of its holder. How many bulbs glow?
9. 9.🔘 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?
10. 10.What does a tilt switch do? (a) slides side to side (b) springs back when let go (c) flips up or down (d) closes when tipped over
11. 11.🔋 How many 2 V cells must be joined in series to give 4 V?
12. 12.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a slide switch (c) a push button (d) a reed switch
13. 13.🔘 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) No (b) Yes
14. 14.True or false: to touch a switch when wet is safe. (a) True (b) False
15. 15.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) ammeter (c) voltmeter (d) motor
16. 16.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) one bulb out, all go out (d) many paths for current
17. 17.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a rubber band. Does the bulb glow? (a) No (b) Yes
18. 18.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) one bulb out, all go out (c) many paths for current (d) a single current path
19. 19.⚡ What does a table fan mainly change electricity into? (a) light (b) sound (c) movement (d) heat
20. 20.🔍 Which is the odd one out? (a) a copper wire (b) a graphite rod (c) aluminium foil (d) a dry cork
21. 21.🔘 Which kind of switch flips up or down? (a) a push button (b) a reed switch (c) a tilt switch (d) a toggle switch
22. 22.Which of these is safe? (a) fly kites in open fields (b) open a phone charger (c) throw cells in a fire (d) poke things in a socket
23. 23.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) a wire is cut (d) the switch is ON
24. 24.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
25. 25.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) own switch for each bulb (d) bulbs share the voltage
26. 26.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
27. 27.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
28. 28.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
29. 29.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) light energy (c) chemical energy (d) sound energy
30. 30.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) the longer line (c) neither line (d) the shorter line
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
32. 32.🔌 Is an iron nail a conductor or an insulator? (a) a conductor (b) an insulator
33. 33.🔍 Which is the odd one out? (a) a rubber eraser (b) a steel coin (c) a ceramic cup (d) a paper strip
34. 34.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
35. 35.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
36. 36.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
37. 37.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
38. 38.💡 A battery lights 5 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
39. 39.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) one single wire (d) a kind of bulb
40. 40.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a plug top (d) a fuse or MCB

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