Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 643 · 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 tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a ceramic cup across the gap. Does the bulb glow? (a) Yes (b) No
2. 2.True or false: if a wire is cut, the circuit is closed and current flows. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) a glass marble (b) a plastic ruler (c) a copper wire (d) a rubber band
4. 4.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
5. 5.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) diode (c) LED (d) motor
6. 6.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the bare end (d) the plastic handle
7. 7.🔍 Which is the odd one out? (a) a buzzer (b) a siren (c) a doorbell (d) a table fan
8. 8.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 2 glow? (a) No (b) Yes
9. 9.True or false: an electric iron mainly gives out light. (a) False (b) True
10. 10.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
11. 11.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
12. 12.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
13. 13.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) straight lines (c) little stars (d) dotted circles
15. 15.💡 Why is house wiring done in parallel? (a) each gets full voltage (b) to save copper only (c) to make bulbs dim (d) so all go off together
16. 16.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) switch (b) capacitor (c) battery (d) bulb
17. 17.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
18. 18.True or false: a circle with a cross is the symbol for a bulb. (a) False (b) True
19. 19.🔦 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 coin. Does the bulb glow? (a) Yes (b) No
20. 20.Which of these mainly makes sound? (a) an electric iron (b) a table fan (c) a buzzer (d) a rice cooker
21. 21.🔍 Which is the odd one out? (a) stay away from pylons (b) climb an electric pole (c) poke things in a socket (d) touch a fallen wire
22. 22.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. Does bulb 6 glow? (a) Yes (b) No
23. 23.True or false: to open a phone charger is not safe. (a) True (b) False
24. 24.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) a small battery pack (c) a mains extension board (d) an inverter socket
25. 25.🔍 Which is the odd one out? (a) take cells out after use (b) keep drinks far away (c) stop if a part gets hot (d) touch a switch when wet
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
27. 27.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
28. 28.🔁 What must there be for a current to flow? (a) a broken path (b) one loose end (c) a plastic gap (d) a complete loop
29. 29.💡 4 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
30. 30.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) a circle with an X in it (c) a circle with M inside (d) a circle with a cross
31. 31.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
32. 32.🔗 Series or parallel circuit: “a break stops every bulb”? (a) parallel (b) series
33. 33.🔋 Does a generator give electricity or use electricity? (a) uses electricity (b) gives electricity
34. 34.Which of these is safe? (a) throw cells in a fire (b) poke things in a socket (c) open a phone charger (d) keep drinks far away
35. 35.🔋 How many 2 V cells must be joined in series to give 8 V?
36. 36.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) in series (c) not joined (d) by Wi-Fi
37. 37.Which of these means the circuit is open? (a) the loop is complete (b) the switch is OFF (c) all wires are joined (d) the switch is ON
38. 38.True or false: a plain rectangle is the symbol for a resistor. (a) True (b) False
39. 39.💡 2 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 1 is taken out of its holder. How many bulbs glow?
40. 40.🔍 Which is the odd one out? (a) a traffic signal (b) a school bell (c) a torch (d) an LED lamp

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