Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 385 · 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.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
2. 2.🔍 Which is the odd one out? (a) an electric toy car (b) an electric drill (c) a ceiling fan (d) an LED lamp
3. 3.💡 6 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. Bulbs 3 and 4 are taken out of their holders. Does bulb 6 glow? (a) No (b) Yes
4. 4.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
5. 5.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) capacitor (b) diode (c) switch (d) motor
6. 6.Which of these is safe? (a) touch a fallen wire (b) fly a kite near wires (c) take cells out after use (d) poke things in a socket
7. 7.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
8. 8.🔍 Which is the odd one out? (a) a traffic signal (b) a night lamp (c) a mixer grinder (d) a street light
9. 9.True or false: if the switch is ON, the circuit is closed and current flows. (a) False (b) True
10. 10.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
11. 11.🔋 Does a water pump give electricity or use electricity? (a) gives electricity (b) uses electricity
12. 12.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
13. 13.🔋 Does a power station give electricity or use electricity? (a) gives electricity (b) uses electricity
14. 14.🔦 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) No (b) Yes
15. 15.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
16. 16.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a fuse or MCB (d) a bulb
17. 17.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is OFF. Does the bulb glow? (a) Yes (b) No
18. 18.Which of these means the circuit is open? (a) the switch is OFF (b) all wires are joined (c) the loop is complete (d) the switch is ON
19. 19.🔍 Which is the odd one out? (a) a brass key (b) aluminium foil (c) a steel coin (d) a paper strip
20. 20.🔌 Is a rubber eraser a conductor or an insulator? (a) an insulator (b) a conductor
21. 21.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a mains extension board (c) a small battery pack (d) an inverter socket
22. 22.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a reed switch (c) a push button (d) a toggle switch
23. 23.🔍 Which is the odd one out? (a) a loudspeaker (b) a torch (c) a night lamp (d) a tube light
24. 24.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) in parallel (c) by Wi-Fi (d) not joined
25. 25.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
26. 26.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken
27. 27.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a rubber band across the gap. Does the bulb glow? (a) Yes (b) No
29. 29.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a conductor (c) an insulator (d) a cell
30. 30.🔗 Series or parallel circuit: “many paths for current”? (a) series (b) parallel
31. 31.🔘 Which kind of switch works only while pressed? (a) a push button (b) a tilt switch (c) a reed switch (d) a toggle switch
32. 32.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
33. 33.Which of these is an insulator? (a) a graphite rod (b) a safety pin (c) a rubber eraser (d) a steel spoon
34. 34.🔌 Why are electric wires covered in plastic? (a) plastic is a conductor (b) plastic is an insulator (c) to make them heavy (d) plastic makes current
35. 35.True or false: a slide switch closes when tipped over. (a) True (b) False
36. 36.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
37. 37.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
38. 38.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
39. 39.🔍 Which is the odd one out? (a) touch a fallen wire (b) fly a kite near wires (c) fly kites in open fields (d) throw cells in a fire
40. 40.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) many paths for current (d) a break stops every bulb

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