Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 688 · 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 battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
2. 2.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) a series circuit (d) an open circuit
3. 3.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) only one (c) none (d) both of them
4. 4.🔦 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
5. 5.True or false: two equal parallel lines is the symbol for a capacitor. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) touch a switch when wet (b) dry your hands first (c) take cells out after use (d) stay away from pylons
7. 7.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
8. 8.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
9. 9.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) True (b) False
10. 10.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.Which of these uses electricity? (a) a mobile phone (b) a cell (c) a generator (d) a wind turbine
12. 12.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
13. 13.⚡ What does a mixer grinder mainly change electricity into? (a) sound (b) light (c) heat (d) movement
14. 14.🔁 What must there be for a current to flow? (a) one loose end (b) a complete loop (c) a broken path (d) a plastic gap
15. 15.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
16. 16.True or false: a plastic straw is a conductor. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a steel coin (b) a copper wire (c) a plastic ruler (d) a brass key
18. 18.🔌 Most metals are good … (a) conductors (b) insulators (c) batteries (d) magnets only
19. 19.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
20. 20.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
21. 21.🔌 Is a paper strip a conductor or an insulator? (a) an insulator (b) a conductor
22. 22.🔍 Which is the odd one out? (a) stay away from pylons (b) stop if a part gets hot (c) touch a fallen wire (d) dry your hands first
23. 23.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
24. 24.⚠️ Why must we never touch switches with wet hands? (a) water carries current (b) it spoils the paint (c) water makes it cold (d) it is just untidy
25. 25.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
26. 26.True or false: to climb an electric pole is safe. (a) True (b) False
27. 27.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
28. 28.🔍 Which is the odd one out? (a) a doorbell (b) a school bell (c) a buzzer (d) a room heater
29. 29.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.🔘 Which kind of switch springs back when let go? (a) a tilt switch (b) a reed switch (c) a push button (d) a slide switch
31. 31.True or false: a toggle switch slides side to side. (a) False (b) True
32. 32.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the glass (c) the switch (d) the filament
33. 33.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
34. 34.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
35. 35.Which drawing is the symbol for a junction? (a) a straight line (b) triangle, bar and arrows (c) a dot where wires meet (d) many long-short pairs
36. 36.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
37. 37.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is ON and D is ON. Does the bulb glow? (a) No (b) Yes
38. 38.💡 5 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
39. 39.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) capacitor (b) motor (c) voltmeter (d) diode
40. 40.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False

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