Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 524 · 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.💡 Why is house wiring done in parallel? (a) to save copper only (b) to make bulbs dim (c) each gets full voltage (d) so all go off together
2. 2.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
3. 3.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 1 glow? (a) No (b) Yes
4. 4.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
5. 5.True or false: triangle, bar and arrows is the symbol for a battery. (a) False (b) True
6. 6.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
7. 7.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) water drops (c) dust particles (d) photons
8. 8.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) a wire has come loose (c) a wire is cut (d) the switch is ON
9. 9.True or false: if all wires are joined, the circuit is closed and current flows. (a) True (b) False
10. 10.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) never (d) only when both are ON
11. 11.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
12. 12.🔁 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
13. 13.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
14. 14.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
15. 15.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) cell (b) motor (c) battery (d) capacitor
16. 16.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire has come loose (c) all wires are joined (d) the switch is OFF
17. 17.Which of these mainly makes movement? (a) an electric toy car (b) a school bell (c) an electric kettle (d) an LED lamp
18. 18.True or false: to climb an electric pole is safe. (a) True (b) False
19. 19.Which of these mainly makes movement? (a) a school bell (b) a toaster (c) a traffic signal (d) a ceiling fan
20. 20.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) one loose end (d) a plastic gap
21. 21.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 12 V (d) 230 V
22. 22.🔌 Most metals are good … (a) insulators (b) magnets only (c) batteries (d) conductors
23. 23.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
24. 24.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put an iron nail across the gap. Does the bulb glow? (a) Yes (b) No
25. 25.🔍 Which is the odd one out? (a) stay away from pylons (b) stop if a part gets hot (c) build with an adult near (d) use a cable with cuts
26. 26.⚡ What does a traffic signal mainly change electricity into? (a) heat (b) light (c) sound (d) movement
27. 27.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) nobody (c) a stranger online (d) a younger child
28. 28.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
29. 29.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) movement energy (d) light energy
30. 30.True or false: if a wire is cut, the circuit is open and no current flows. (a) False (b) True
31. 31.Which of these mainly makes sound? (a) a loudspeaker (b) an exhaust fan (c) an LED lamp (d) a mixer grinder
32. 32.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
33. 33.Which drawing is the symbol for a wire? (a) a dot where wires meet (b) a straight line (c) a plain rectangle (d) a circle with V inside
34. 34.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) light energy (c) chemical energy (d) wind energy
35. 35.Which drawing is the symbol for an ammeter? (a) one tall, one short bar (b) a dot where wires meet (c) a plain rectangle (d) a circle with A inside
36. 36.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) motor (b) switch (c) diode (d) battery
37. 37.⚡ What does a buzzer mainly change electricity into? (a) light (b) heat (c) movement (d) sound
38. 38.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
39. 39.💡 In a series circuit, how many paths does the current have? (a) two (b) one (c) none (d) one for each bulb
40. 40.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) electric current (c) sound (d) friction

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