Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 278 · 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.🔋 4 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
2. 2.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
3. 3.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
4. 4.💡 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
5. 5.Which drawing is the symbol for a voltmeter? (a) a line lifted at a gap (b) a circle with M inside (c) many long-short pairs (d) a circle with V inside
6. 6.Which of these means the circuit is closed? (a) a wire has come loose (b) a wire is cut (c) all wires are joined (d) a cell is taken out
7. 7.True or false: a plastic ruler is a conductor. (a) False (b) True
8. 8.Which of these is safe? (a) stay away from pylons (b) throw cells in a fire (c) use a cable with cuts (d) open a phone charger
9. 9.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
10. 10.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
11. 11.True or false: a long and a short line is the symbol for a cell. (a) True (b) False
12. 12.Which of these is not safe? (a) stay away from pylons (b) fly a kite near wires (c) take cells out after use (d) fly kites in open fields
13. 13.⚡ What does an electric iron mainly change electricity into? (a) heat (b) movement (c) light (d) sound
14. 14.Which of these is not safe? (a) poke things in a socket (b) take cells out after use (c) use small battery cells (d) stop if a part gets hot
15. 15.True or false: to use small battery cells is not safe. (a) False (b) True
16. 16.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
17. 17.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
18. 18.What does a reed switch do? (a) closes near a magnet (b) works only while pressed (c) stays where you flip it (d) flips up or down
19. 19.Which of these is not safe? (a) fly kites in open fields (b) stop if a part gets hot (c) touch a fallen wire (d) use small battery cells
20. 20.🔘 Two switches are in series. When does the bulb glow? (a) when both are ON (b) when both are OFF (c) when either is ON (d) never
21. 21.🔋 2 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)? =
22. 22.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
23. 23.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
24. 24.⚡ What do we call a flow of electric charge through a wire? (a) electric current (b) a magnet (c) sound (d) friction
25. 25.💡 A battery lights 4 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
26. 26.🔦 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 an iron nail. Does the bulb glow? (a) Yes (b) No
27. 27.Which of these is true of a parallel circuit? (a) used in house wiring (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
28. 28.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) a smaller voltage (d) the same voltage
29. 29.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a bulb (d) a plug top
30. 30.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
31. 31.🔋 How many 1.2 V cells must be joined in series to give 6 V?
32. 32.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) two (d) one
33. 33.True or false: a tube light mainly gives out light. (a) False (b) True
34. 34.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) capacitor (b) switch (c) voltmeter (d) battery
35. 35.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is OFF, C is ON and D is OFF. Does the bulb glow? (a) Yes (b) No
36. 36.💡 2 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. Does bulb 1 glow? (a) Yes (b) No
37. 37.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.💡 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 3 is taken out of its holder. How many bulbs glow?
39. 39.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
40. 40.True or false: a toggle switch springs back when let go. (a) False (b) True

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