Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 441 · 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 means the circuit is open? (a) the switch is ON (b) the loop is complete (c) all wires are joined (d) the bulb is unscrewed
2. 2.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
3. 3.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) an inverter socket (c) a wall socket (d) a small battery pack
4. 4.🔦 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) Yes (b) No
5. 5.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to make it colourful (d) to hide the circuit
6. 6.💡 3 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
7. 7.🔋 4 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)? =
8. 8.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
9. 9.Which of these means the circuit is closed? (a) all wires are joined (b) a wire is cut (c) a cell is taken out (d) the switch is OFF
10. 10.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
11. 11.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
12. 12.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
13. 13.True or false: a circle with A inside is the symbol for an ammeter. (a) False (b) True
14. 14.Which drawing is the symbol for a cell? (a) a circle with V inside (b) a small empty box (c) a circle with an X in it (d) a long and a short line
15. 15.True or false: to touch a fallen wire is safe. (a) False (b) True
16. 16.True or false: to keep drinks far away is safe. (a) False (b) True
17. 17.🔌 Which metal is used for most electric wires at home? (a) plastic (b) copper (c) rubber (d) glass
18. 18.Which of these is a conductor? (a) a rubber band (b) a wooden stick (c) a brass key (d) a plastic ruler
19. 19.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
20. 20.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) Yes (b) No
21. 21.🔍 Which is the odd one out? (a) a siren (b) a loudspeaker (c) a school bell (d) an electric kettle
22. 22.🔍 Which is the odd one out? (a) open a phone charger (b) build with an adult near (c) poke things in a socket (d) use a cable with cuts
23. 23.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
24. 24.Which drawing is the symbol for a cell? (a) a plain rectangle (b) triangle against a bar (c) one tall, one short bar (d) a dot where wires meet
25. 25.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put aluminium foil across the gap. Does the bulb glow? (a) Yes (b) No
26. 26.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) voltmeter (b) switch (c) motor (d) ammeter
27. 27.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) switch (b) ammeter (c) cell (d) battery
28. 28.Which drawing is the symbol for a capacitor? (a) two or more cell symbols (b) a circle with V inside (c) two equal parallel lines (d) a dot where wires meet
29. 29.Which of these is an insulator? (a) a ceramic cup (b) an iron nail (c) a copper wire (d) a safety pin
30. 30.🔍 Which is the odd one out? (a) a brass key (b) a safety pin (c) aluminium foil (d) a plastic straw
31. 31.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
32. 32.Which of these uses electricity? (a) a cell (b) a generator (c) a wind turbine (d) a computer
33. 33.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) No (b) Yes
34. 34.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) throw them in a fire (d) cut them open
35. 35.What does a reed switch do? (a) stays where you flip it (b) closes when tipped over (c) closes near a magnet (d) works only while pressed
36. 36.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
37. 37.Which drawing is the symbol for a resistor? (a) two equal parallel lines (b) a circle with M inside (c) one tall, one short bar (d) a plain rectangle
38. 38.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
39. 39.🔍 Which is the odd one out? (a) a room heater (b) a table fan (c) a mixer grinder (d) an electric toy car
40. 40.True or false: many long-short pairs is the symbol for a diode. (a) True (b) False

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