Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 62 · 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: “each gets the full volts” is true of a series circuit. (a) False (b) True
2. 2.🔘 A bulb and a cell are joined through 3 switches on 3 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?
3. 3.💡 3 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. Does bulb 2 glow? (a) No (b) Yes
4. 4.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a plain rectangle (c) a circle with a cross (d) many long-short pairs
5. 5.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
6. 6.True or false: an iron nail is a conductor. (a) False (b) True
7. 7.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) an inverter socket (d) a small battery pack
8. 8.True or false: a steel coin is a conductor. (a) True (b) False
9. 9.Which of these is safe? (a) touch a switch when wet (b) use small battery cells (c) poke things in a socket (d) touch a fallen wire
10. 10.Which of these is true of a series circuit? (a) many paths for current (b) a single current path (c) own switch for each bulb (d) one out, the rest glow
11. 11.Which drawing is the symbol for a capacitor? (a) a dot where wires meet (b) two equal parallel lines (c) a long and a short line (d) a circle with A inside
12. 12.🔍 Which is the odd one out? (a) aluminium foil (b) a rubber band (c) a steel coin (d) a steel spoon
13. 13.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a safe circuit (b) a short circuit (c) an open circuit (d) a parallel circuit
14. 14.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
15. 15.🔋 8 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
16. 16.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) water makes it cold (c) it spoils the paint (d) it is just untidy
17. 17.🔘 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) Yes (b) No
18. 18.💡 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 5 and 6 are taken out of their holders. Does bulb 3 glow? (a) No (b) Yes
19. 19.Which of these means the circuit is closed? (a) a wire has come loose (b) all wires are joined (c) a cell is taken out (d) the switch is OFF
20. 20.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) a wire has come loose (d) all wires are joined
21. 21.True or false: an LED lamp mainly gives out light. (a) False (b) True
22. 22.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
23. 23.True or false: to use small battery cells is not safe. (a) True (b) False
24. 24.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
25. 25.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
26. 26.True or false: a mixer grinder mainly makes movement. (a) False (b) True
27. 27.🔘 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?
28. 28.🔌 Is a paper strip a conductor or an insulator? (a) a conductor (b) an insulator
29. 29.💡 Why is house wiring done in parallel? (a) to save copper only (b) so all go off together (c) to make bulbs dim (d) each gets full voltage
30. 30.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
31. 31.🔍 Which is the odd one out? (a) fly kites in open fields (b) stop if a part gets hot (c) build with an adult near (d) poke things in a socket
32. 32.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) a kind of bulb (d) two or more cells joined
33. 33.Which of these is an insulator? (a) an iron nail (b) a dry cork (c) a copper wire (d) a steel coin
34. 34.🔍 Which is the odd one out? (a) fly a kite near wires (b) throw cells in a fire (c) touch a switch when wet (d) use small battery cells
35. 35.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) No (b) Yes
36. 36.Which of these gives us electricity? (a) a cell (b) a washing machine (c) a television (d) a computer
37. 37.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) switch (b) voltmeter (c) wire (d) battery
38. 38.True or false: a street light mainly gives out light. (a) False (b) True
39. 39.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) switch (b) motor (c) bulb (d) voltmeter

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