Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 335 · 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.🔋 Does a battery give electricity or use electricity? (a) uses electricity (b) gives electricity
2. 2.True or false: a tilt switch stays where you flip it. (a) False (b) True
3. 3.🔦 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 a steel spoon. Does the bulb glow? (a) Yes (b) No
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) neither line (d) both lines
5. 5.🔘 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 OFF and D is OFF. Does the bulb glow? (a) Yes (b) No
6. 6.🔍 Which is the odd one out? (a) a safety pin (b) a woollen thread (c) a copper wire (d) a brass key
7. 7.🔘 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
8. 8.🔘 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?
9. 9.True or false: a glass marble is a conductor. (a) True (b) False
10. 10.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
11. 11.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the metal tip (c) the bare end (d) the plastic handle
12. 12.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) cut them open (d) give them for recycling
13. 13.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
14. 14.Which drawing is the symbol for a wire? (a) triangle, bar and arrows (b) a dot where wires meet (c) a straight line (d) two equal parallel lines
15. 15.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
16. 16.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
17. 17.✏️ In a circuit diagram, wires are usually drawn as … (a) dotted circles (b) straight lines (c) wavy lines (d) little stars
18. 18.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
19. 19.Which of these gives us electricity? (a) a washing machine (b) a computer (c) a bicycle dynamo (d) an air conditioner
20. 20.🔌 Which metal is used for most electric wires at home? (a) plastic (b) copper (c) rubber (d) glass
21. 21.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
22. 22.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
23. 23.Which of these mainly makes movement? (a) a doorbell (b) a ceiling fan (c) a toaster (d) a torch
24. 24.⚠️ 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) a parallel circuit (d) an open circuit
25. 25.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a bulb (d) a long wire
26. 26.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic makes current (c) to make them heavy (d) plastic is an insulator
27. 27.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
28. 28.Which of these is true of a series circuit? (a) one bulb out, all go out (b) many paths for current (c) each gets the full volts (d) one out, the rest glow
29. 29.True or false: a toggle switch works only while pressed. (a) False (b) True
30. 30.True or false: many long-short pairs is the symbol for a battery. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a steel coin (b) a steel spoon (c) a metal paper clip (d) a cotton thread
32. 32.Which of these is a conductor? (a) a plastic straw (b) a rubber band (c) a paper strip (d) a graphite rod
33. 33.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
34. 34.⚠️ Which power source should children use for electronics projects? (a) an inverter socket (b) a wall socket (c) a mains extension board (d) a small battery pack
35. 35.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) ammeter (b) resistor (c) bulb (d) junction
36. 36.True or false: to dry your hands first is safe. (a) False (b) True
37. 37.💡 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
38. 38.🔍 Which is the odd one out? (a) a plastic straw (b) a glass marble (c) a metal paper clip (d) a cotton thread
39. 39.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 230 V (c) 9 V (d) 12 V
40. 40.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)

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