Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 547 · 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 safe? (a) poke things in a socket (b) use small battery cells (c) touch a switch when wet (d) touch a fallen wire
2. 2.🔍 Which is the odd one out? (a) a rubber eraser (b) a rubber band (c) a steel spoon (d) a wooden stick
3. 3.🔍 Which is the odd one out? (a) climb an electric pole (b) fly kites in open fields (c) use a cable with cuts (d) open a phone charger
4. 4.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
5. 5.Which of these is safe? (a) build with an adult near (b) touch a switch when wet (c) touch a fallen wire (d) fly a kite near wires
6. 6.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
7. 7.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
8. 8.Which of these is true of a series circuit? (a) used in house wiring (b) bulbs share the voltage (c) many paths for current (d) own switch for each bulb
9. 9.🔍 Which is the odd one out? (a) stop if a part gets hot (b) climb an electric pole (c) touch a switch when wet (d) poke things in a socket
10. 10.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
11. 11.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) capacitor (b) battery (c) diode (d) wire
12. 12.Which of these mainly makes sound? (a) a rice cooker (b) an electric drill (c) a siren (d) a water heater
13. 13.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
14. 14.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
15. 15.True or false: if all wires are joined, the circuit is open and no current flows. (a) False (b) True
16. 16.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
17. 17.🔍 Which is the odd one out? (a) dry your hands first (b) use a cable with cuts (c) build with an adult near (d) use small battery cells
18. 18.🔋 How many 3 V cells must be joined in series to give 12 V?
19. 19.🔍 Which is the odd one out? (a) a table fan (b) a mixer grinder (c) an electric toy car (d) a doorbell
20. 20.🔋 How many 2 V cells must be joined in series to give 14 V?
21. 21.True or false: a graphite rod is a conductor. (a) False (b) True
22. 22.🔘 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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
23. 23.💡 4 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
24. 24.🔌 Is a steel spoon a conductor or an insulator? (a) an insulator (b) a conductor
25. 25.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) electric current (d) friction
26. 26.🔍 Which is the odd one out? (a) touch a switch when wet (b) fly a kite near wires (c) use small battery cells (d) use mains for a project
27. 27.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
28. 28.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
30. 30.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
31. 31.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber eraser across the gap. Does the bulb glow? (a) Yes (b) No
33. 33.Which of these gives us electricity? (a) an air conditioner (b) a computer (c) a water pump (d) a bicycle dynamo
34. 34.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
35. 35.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) both of them (c) it does not matter (d) only one
36. 36.⚡ What does a loudspeaker mainly change electricity into? (a) light (b) sound (c) heat (d) movement
37. 37.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 230 V (c) 9 V (d) 1.5 V
38. 38.Which drawing is the symbol for a motor? (a) a circle with M inside (b) a circle with V inside (c) a long and a short line (d) a circle with A inside
39. 39.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
40. 40.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 1.5 V (d) 15 V

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