Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 29 · 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.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) straight lines (d) dotted circles
3. 3.True or false: an electric iron mainly makes movement. (a) False (b) True
4. 4.Which of these is not safe? (a) stop if a part gets hot (b) stay away from pylons (c) take cells out after use (d) poke things in a socket
5. 5.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a bulb (d) a fuse or MCB
6. 6.True or false: to dry your hands first is not safe. (a) False (b) True
7. 7.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
8. 8.💡 6 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. Bulbs 2 and 3 are taken out of their holders. How many bulbs glow?
9. 9.Which of these is not safe? (a) stay away from pylons (b) stop if a part gets hot (c) fly a kite near wires (d) build with an adult near
10. 10.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) friction (d) electric current
11. 11.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
12. 12.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
13. 13.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
14. 14.🔘 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 OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
15. 15.🔦 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
16. 16.Which of these means the circuit is closed? (a) a wire is cut (b) the switch is ON (c) a wire has come loose (d) the switch is OFF
17. 17.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
18. 18.⚡ What does an electric iron mainly change electricity into? (a) movement (b) heat (c) light (d) sound
19. 19.🔍 Which is the odd one out? (a) an electric drill (b) an exhaust fan (c) a ceiling fan (d) a traffic signal
20. 20.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) Yes (b) No
21. 21.🔘 Which kind of switch flips up or down? (a) a toggle switch (b) a slide switch (c) a tilt switch (d) a push button
22. 22.🔘 A bulb and a cell are joined through 5 switches on 5 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?
23. 23.Which of these is true of a series circuit? (a) used in house wiring (b) one out, the rest glow (c) bulbs share the voltage (d) each gets the full volts
24. 24.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) cut them open (d) throw them in a fire
25. 25.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
26. 26.True or false: to stop if a part gets hot is not safe. (a) True (b) False
27. 27.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
28. 28.🔍 Which is the odd one out? (a) take cells out after use (b) fly a kite near wires (c) stay away from pylons (d) build with an adult near
29. 29.🔦 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
30. 30.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) voltmeter (b) wire (c) capacitor (d) cell
31. 31.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
32. 32.True or false: a water heater mainly gives out heat. (a) False (b) True
33. 33.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) ammeter (b) battery (c) wire (d) switch
34. 34.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are ON (c) only when both are OFF (d) never
35. 35.🔌 Is a brass key a conductor or an insulator? (a) an insulator (b) a conductor
36. 36.Which drawing is the symbol for a voltmeter? (a) a dot where wires meet (b) triangle against a bar (c) a plain rectangle (d) a circle with V inside
37. 37.🔍 Which is the odd one out? (a) poke things in a socket (b) use small battery cells (c) take cells out after use (d) fly kites in open fields
38. 38.🔌 Which metal is used for most electric wires at home? (a) copper (b) glass (c) plastic (d) rubber
39. 39.💡 5 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?
40. 40.🔍 Which is the odd one out? (a) open a phone charger (b) use mains for a project (c) take cells out after use (d) poke things in a socket

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