Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 355 · 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.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) the longer line (c) both lines (d) the shorter line
2. 2.True or false: one tall, one short bar is the symbol for a cell. (a) True (b) False
3. 3.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
4. 4.⚠️ Is it safe to open a phone charger? (a) safe (b) not safe
5. 5.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are ON (c) only when both are OFF (d) never
6. 6.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
7. 7.🔍 Which is the odd one out? (a) build with an adult near (b) throw cells in a fire (c) fly kites in open fields (d) keep drinks far away
8. 8.🔍 Which is the odd one out? (a) a water heater (b) a room heater (c) a buzzer (d) a rice cooker
9. 9.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
10. 10.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
11. 11.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
12. 12.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
13. 13.True or false: to stop if a part gets hot is safe. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) stay away from pylons (b) take cells out after use (c) keep drinks far away (d) fly a kite near wires
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) voltmeter (b) resistor (c) cell (d) switch
17. 17.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
18. 18.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to make it colourful (d) to hide the circuit
19. 19.🔋 How many 1.5 V cells must be joined in series to give 12 V?
20. 20.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) pull them by the hand (c) shout for an adult (d) wait and watch
21. 21.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
22. 22.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
23. 23.🔦 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 steel coin. Does the bulb glow? (a) Yes (b) No
24. 24.Which of these is not safe? (a) open a phone charger (b) fly kites in open fields (c) use small battery cells (d) build with an adult near
25. 25.💡 6 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. Does bulb 6 glow? (a) No (b) Yes
26. 26.True or false: a graphite rod is a conductor. (a) True (b) False
27. 27.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a safety pin. Does the bulb glow? (a) Yes (b) No
28. 28.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 0.5 V (d) 1.5 V
29. 29.True or false: a line lifted at a gap is the symbol for a cell. (a) True (b) False
30. 30.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
31. 31.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
32. 32.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
33. 33.🔍 Which is the odd one out? (a) stop if a part gets hot (b) use small battery cells (c) poke things in a socket (d) dry your hands first
34. 34.🔍 Which is the odd one out? (a) dry your hands first (b) use mains for a project (c) fly kites in open fields (d) use small battery cells
35. 35.🔍 Which is the odd one out? (a) a street light (b) an electric iron (c) an electric kettle (d) a rice cooker
36. 36.True or false: a siren mainly makes sound. (a) True (b) False
37. 37.⚡ What does a table fan mainly change electricity into? (a) sound (b) heat (c) movement (d) light
38. 38.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a bulb (d) a fuse or MCB
39. 39.🔌 Is a rubber band a conductor or an insulator? (a) an insulator (b) a conductor
40. 40.🔦 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 aluminium foil. Does the bulb glow? (a) No (b) Yes

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