Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 531 · 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.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. How many bulbs glow?
2. 2.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
3. 3.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
4. 4.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) the longer line (c) both lines (d) neither line
5. 5.🔦 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 glass marble. Does the bulb glow? (a) Yes (b) No
6. 6.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a small battery pack (d) a mains extension board
7. 7.Which of these means the circuit is closed? (a) a cell is taken out (b) the bulb is unscrewed (c) a wire is cut (d) the loop is complete
8. 8.Which drawing is the symbol for a bulb? (a) triangle, bar and arrows (b) a circle with an X in it (c) one tall, one short bar (d) a long and a short line
9. 9.⚡ What does a school bell mainly change electricity into? (a) heat (b) movement (c) light (d) sound
10. 10.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
11. 11.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
12. 12.⚡ What does a toaster mainly change electricity into? (a) movement (b) sound (c) heat (d) light
13. 13.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
14. 14.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) a switch with a lid (d) two or more cells joined
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) No (b) Yes
16. 16.Which of these means the circuit is closed? (a) a wire is cut (b) the switch is OFF (c) the bulb is unscrewed (d) all wires are joined
17. 17.Which of these is safe? (a) open a phone charger (b) build with an adult near (c) use mains for a project (d) poke things in a socket
18. 18.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
19. 19.What does a toggle switch do? (a) slides side to side (b) flips up or down (c) springs back when let go (d) works only while pressed
20. 20.⚡ What does an electric iron mainly change electricity into? (a) heat (b) sound (c) light (d) movement
21. 21.True or false: if the loop is complete, the circuit is open and no current flows. (a) True (b) False
22. 22.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) no voltage (d) the same voltage
23. 23.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 1 of the switches is OFF and the rest are ON. How many bulbs glow?
24. 24.🔍 Which is the odd one out? (a) a room heater (b) a water heater (c) an electric kettle (d) an exhaust fan
25. 25.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
26. 26.🔘 When a switch is ON, the circuit is … (a) open (b) closed (c) cut (d) broken
27. 27.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a fuse or MCB (c) a plug top (d) a long wire
28. 28.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
29. 29.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed
30. 30.🔍 Which is the odd one out? (a) a steel spoon (b) a ceramic cup (c) a glass marble (d) a rubber band
31. 31.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 1.5 V (c) 12 V (d) 230 V
32. 32.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) plastic is an insulator (d) to make them heavy
33. 33.Which of these means the circuit is open? (a) all wires are joined (b) a cell is taken out (c) the loop is complete (d) the switch is ON
34. 34.⚡ What does a buzzer mainly change electricity into? (a) heat (b) movement (c) sound (d) light
35. 35.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a push button (c) a reed switch (d) a tilt switch
36. 36.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
37. 37.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 is cut
38. 38.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) a circle with an X in it (c) triangle, bar and arrows (d) two or more cell symbols
39. 39.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
40. 40.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes

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