Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 483 · 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: an electric drill mainly gives out light. (a) True (b) False
2. 2.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are OFF (c) never (d) only when both are ON
3. 3.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
4. 4.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
5. 5.What does a slide switch do? (a) closes near a magnet (b) springs back when let go (c) slides side to side (d) stays where you flip it
6. 6.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) a circle with A inside (c) two or more cell symbols (d) many long-short pairs
7. 7.True or false: two equal parallel lines is the symbol for a diode. (a) True (b) False
8. 8.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
9. 9.🔌 Is a wooden stick a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) each gets full voltage (c) so all go off together (d) to save copper only
11. 11.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the metal tip (c) the bare end (d) the steel shaft
12. 12.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
13. 13.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) resistor (b) cell (c) capacitor (d) switch
14. 14.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
15. 15.💡 5 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
16. 16.What does a push button do? (a) flips up or down (b) closes near a magnet (c) stays where you flip it (d) works only while pressed
17. 17.True or false: “used in house wiring” is true of a parallel circuit. (a) True (b) False
18. 18.True or false: to take cells out after use is not safe. (a) True (b) False
19. 19.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a tilt switch (c) a toggle switch (d) a push button
20. 20.⚠️ 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
21. 21.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
22. 22.💡 5 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
23. 23.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
24. 24.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the filament (d) the switch
25. 25.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
26. 26.✏️ In a circuit diagram, which part is drawn as a dot where wires meet? (a) wire (b) capacitor (c) diode (d) junction
27. 27.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
28. 28.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) a wire is cut (d) all wires are joined
29. 29.Which of these means the circuit is open? (a) the loop is complete (b) the bulb is unscrewed (c) all wires are joined (d) the switch is ON
30. 30.🔘 Which kind of switch works only while pressed? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a push button
31. 31.🔍 Which is the odd one out? (a) a rubber band (b) a brass key (c) a wooden stick (d) a plastic ruler
32. 32.🔍 Which is the odd one out? (a) a dry cork (b) a glass marble (c) a steel coin (d) a plastic straw
33. 33.🔍 Which is the odd one out? (a) a glass marble (b) a wooden stick (c) a copper wire (d) a ceramic cup
34. 34.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.🔘 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 OFF. Does the bulb glow? (a) No (b) Yes
36. 36.🔍 Which is the odd one out? (a) take cells out after use (b) touch a fallen wire (c) dry your hands first (d) stay away from pylons
37. 37.True or false: a tilt switch works only while pressed. (a) True (b) False
38. 38.🔦 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 a glass marble. Does the bulb glow? (a) Yes (b) No
39. 39.🔘 A bulb and a cell are joined through 2 switches on 2 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?
40. 40.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?

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