Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 232 · 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.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 9 V (c) 12 V (d) 1.5 V
2. 2.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
3. 3.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) bulb (b) ammeter (c) motor (d) voltmeter
4. 4.⚡ What does a rice cooker mainly change electricity into? (a) movement (b) light (c) heat (d) sound
5. 5.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a short circuit (c) a safe circuit (d) an open circuit
6. 6.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
7. 7.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
8. 8.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.True or false: a toaster mainly gives out light. (a) False (b) True
10. 10.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
11. 11.🔋 6 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)? =
12. 12.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
13. 13.Which drawing is the symbol for a wire? (a) a straight line (b) one tall, one short bar (c) a small empty box (d) a long and a short line
14. 14.🔌 Why are electric wires covered in plastic? (a) plastic is an insulator (b) to make them heavy (c) plastic is a conductor (d) plastic makes current
15. 15.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
16. 16.True or false: to keep drinks far away is not safe. (a) False (b) True
17. 17.Which of these is an insulator? (a) a safety pin (b) a steel spoon (c) a paper strip (d) a brass key
18. 18.🔘 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
19. 19.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.True or false: a loudspeaker mainly makes sound. (a) True (b) False
21. 21.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) cell (b) LED (c) resistor (d) ammeter
22. 22.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
23. 23.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
24. 24.💡 3 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
25. 25.🔍 Which is the odd one out? (a) a torch (b) a tube light (c) a loudspeaker (d) a street light
26. 26.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
27. 27.True or false: one tall, one short bar is the symbol for a cell. (a) True (b) False
28. 28.✏️ In a circuit diagram, which part is drawn as a straight line? (a) bulb (b) cell (c) wire (d) resistor
29. 29.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
30. 30.True or false: if the switch is OFF, the circuit is open and no current flows. (a) False (b) True
31. 31.🔌 Most metals are good … (a) magnets only (b) batteries (c) insulators (d) conductors
32. 32.💡 5 identical bulbs are joined in series with a 15 V battery (ideal wires). How many volts does each bulb get? =
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) straight lines (d) wavy lines
34. 34.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
35. 35.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) Yes (b) No
36. 36.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
37. 37.Which drawing is the symbol for a switch? (a) a circle with V inside (b) a circle with M inside (c) a circle with A inside (d) a line lifted at a gap
38. 38.True or false: a plain rectangle is the symbol for a battery. (a) False (b) True
39. 39.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) a complete loop (d) one loose end
40. 40.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) closed (d) broken

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