Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 55 · 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: to stop if a part gets hot is not safe. (a) False (b) True
2. 2.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
3. 3.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
4. 4.🔍 Which is the odd one out? (a) a metal paper clip (b) a glass marble (c) a ceramic cup (d) a plastic ruler
5. 5.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
6. 6.What does a slide switch do? (a) slides side to side (b) stays where you flip it (c) closes when tipped over (d) flips up or down
7. 7.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
8. 8.🔦 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
9. 9.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
10. 10.💡 Why is house wiring done in parallel? (a) so all go off together (b) each gets full voltage (c) to save copper only (d) to make bulbs dim
11. 11.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
12. 12.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
13. 13.🔍 Which is the odd one out? (a) a night lamp (b) an exhaust fan (c) a tube light (d) an LED lamp
14. 14.🔍 Which is the odd one out? (a) fly kites in open fields (b) stay away from pylons (c) touch a switch when wet (d) dry your hands first
15. 15.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) a kind of bulb (d) two or more cells joined
17. 17.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) resistor (b) diode (c) switch (d) bulb
18. 18.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a push button
19. 19.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
20. 20.🔍 Which is the odd one out? (a) a safety pin (b) a brass key (c) a rubber eraser (d) a graphite rod
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they all go out (d) they keep glowing
22. 22.Which drawing is the symbol for a motor? (a) a line lifted at a gap (b) many long-short pairs (c) one tall, one short bar (d) a circle with M inside
23. 23.What does a tilt switch do? (a) flips up or down (b) stays where you flip it (c) slides side to side (d) closes when tipped over
24. 24.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
25. 25.True or false: a safety pin is a conductor. (a) True (b) False
26. 26.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
27. 27.True or false: a toggle switch closes when tipped over. (a) True (b) False
28. 28.True or false: an LED lamp mainly makes movement. (a) False (b) True
29. 29.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) many paths for current (d) one bulb out, all go out
30. 30.🔘 What does a switch do in a circuit? (a) stores current (b) makes electricity (c) opens or closes the loop (d) changes the voltage
31. 31.Which of these is not safe? (a) take cells out after use (b) build with an adult near (c) dry your hands first (d) fly a kite near wires
32. 32.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
33. 33.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
34. 34.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) an open circuit (b) a parallel circuit (c) a safe circuit (d) a short circuit
35. 35.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
37. 37.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a bulb (d) a long wire
38. 38.Which drawing is the symbol for a capacitor? (a) a circle with V inside (b) a plain rectangle (c) two or more cell symbols (d) two equal parallel lines
39. 39.🔍 Which is the odd one out? (a) an LED lamp (b) an electric kettle (c) a night lamp (d) a street light
40. 40.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)

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