Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 79 · 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.Which of these is true of a series circuit? (a) own switch for each bulb (b) one out, the rest glow (c) a single current path (d) many paths for current
2. 2.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
3. 3.True or false: if a cell is taken out, the circuit is open and no current flows. (a) False (b) True
4. 4.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
5. 5.Which drawing is the symbol for a capacitor? (a) many long-short pairs (b) a straight line (c) a circle with a cross (d) two equal parallel lines
6. 6.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) ammeter (b) LED (c) junction (d) cell
7. 7.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
8. 8.True or false: two equal parallel lines is the symbol for a resistor. (a) True (b) False
9. 9.🔘 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) No (b) Yes
10. 10.🔘 Which kind of switch works only while pressed? (a) a push button (b) a tilt switch (c) a slide switch (d) a toggle switch
11. 11.Which of these is true of a parallel circuit? (a) a single current path (b) bulbs share the voltage (c) many paths for current (d) a break stops every bulb
12. 12.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire is cut (c) all wires are joined (d) a cell is taken out
13. 13.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
14. 14.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) a wire is cut (d) the loop is complete
15. 15.🔋 Does a bicycle dynamo give electricity or use electricity? (a) uses electricity (b) gives electricity
16. 16.🔘 What does a switch do in a circuit? (a) changes the voltage (b) stores current (c) makes electricity (d) opens or closes the loop
17. 17.🔍 Which is the odd one out? (a) a safety pin (b) a paper strip (c) a dry cork (d) a plastic ruler
18. 18.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
19. 19.💡 4 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
20. 20.Which of these is a conductor? (a) a dry cork (b) an iron nail (c) a woollen thread (d) a rubber eraser
21. 21.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
22. 22.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) nobody (c) a younger child (d) a trusted adult
23. 23.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
25. 25.True or false: a slide switch slides side to side. (a) True (b) False
26. 26.🔋 What should you do with used-up cells? (a) bury them in soil (b) cut them open (c) throw them in a fire (d) give them for recycling
27. 27.🔦 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) Yes (b) No
28. 28.True or false: a night lamp mainly gives out light. (a) True (b) False
29. 29.Which of these is not safe? (a) dry your hands first (b) touch a fallen wire (c) use small battery cells (d) stop if a part gets hot
30. 30.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
31. 31.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
32. 32.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
33. 33.True or false: a siren mainly makes sound. (a) True (b) False
34. 34.🔘 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 ON, B is ON and C is OFF. Does the bulb glow? (a) No (b) Yes
35. 35.🔦 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 a glass marble. Does the bulb glow? (a) Yes (b) No
36. 36.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) only when both are OFF (c) when either is ON (d) only when both are ON
37. 37.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) Yes (b) No
39. 39.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) one out, the rest glow (c) bulbs share the voltage (d) a single current path
40. 40.Which of these mainly makes movement? (a) a room heater (b) a ceiling fan (c) a rice cooker (d) a tube light

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