Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 210 · 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.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) none (d) both of them
2. 2.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) shout for an adult (c) pull them by the hand (d) wait and watch
3. 3.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 15 V (c) 230 V (d) 0.5 V
4. 4.Which of these uses electricity? (a) a wind turbine (b) a power station (c) a generator (d) an air conditioner
5. 5.🔦 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) No (b) Yes
6. 6.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) light energy (c) chemical energy (d) sound energy
7. 7.⚠️ Is it safe to use mains for a project? (a) not safe (b) safe
8. 8.Which of these mainly makes sound? (a) an electric kettle (b) an electric toy car (c) a loudspeaker (d) an LED lamp
9. 9.Which of these means the circuit is open? (a) all wires are joined (b) the loop is complete (c) the switch is ON (d) a wire has come loose
10. 10.🔌 Is a glass marble a conductor or an insulator? (a) an insulator (b) a conductor
11. 11.🔋 Does a wind turbine give electricity or use electricity? (a) gives electricity (b) uses electricity
12. 12.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 230 V (c) 9 V (d) 1.5 V
13. 13.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a series circuit (c) a closed circuit (d) a full circuit
14. 14.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) True (b) False
15. 15.Which drawing is the symbol for a voltmeter? (a) triangle, bar and arrows (b) a dot where wires meet (c) a circle with V inside (d) a circle with A inside
16. 16.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
17. 17.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. How many bulbs glow?
18. 18.Which of these is true of a series circuit? (a) used in house wiring (b) a break stops every bulb (c) one out, the rest glow (d) many paths for current
19. 19.🔍 Which is the odd one out? (a) an iron nail (b) a dry cork (c) a cotton thread (d) a paper strip
20. 20.🔍 Which is the odd one out? (a) aluminium foil (b) a ceramic cup (c) a brass key (d) a safety pin
21. 21.⚡ What does a siren mainly change electricity into? (a) movement (b) light (c) heat (d) sound
22. 22.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) the switch is OFF
23. 23.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) resistor (b) capacitor (c) cell (d) junction
24. 24.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) by Wi-Fi (c) in series (d) in parallel
25. 25.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
26. 26.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe
27. 27.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
28. 28.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the glass (c) the base (d) the switch
29. 29.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a break stops every bulb (c) used in house wiring (d) one bulb out, all go out
30. 30.True or false: to throw cells in a fire is safe. (a) False (b) True
31. 31.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is ON (c) the bulb is unscrewed (d) a wire has come loose
32. 32.Which of these is safe? (a) throw cells in a fire (b) climb an electric pole (c) build with an adult near (d) open a phone charger
33. 33.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
34. 34.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) a night lamp (b) a torch (c) a table fan (d) an LED lamp
36. 36.🔁 Is the circuit closed or open if a wire is cut? (a) open (b) closed
37. 37.🔦 A circuit has a used-up (dead) 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 paper strip. Does the bulb glow? (a) No (b) Yes
38. 38.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
39. 39.🔘 Which kind of switch closes near a magnet? (a) a tilt switch (b) a slide switch (c) a reed switch (d) a toggle switch
40. 40.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =

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