Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 634 · 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.True or false: to build with an adult near is safe. (a) False (b) True
2. 2.Which of these means the circuit is open? (a) a wire has come loose (b) the loop is complete (c) the switch is ON (d) all wires are joined
3. 3.⚠️ Is it safe to touch a fallen wire? (a) not safe (b) safe
4. 4.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
5. 5.🔘 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) No (b) Yes
6. 6.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 9 V (d) 230 V
7. 7.💡 5 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
8. 8.Which of these mainly gives out heat? (a) an electric iron (b) a street light (c) a buzzer (d) a loudspeaker
9. 9.🔌 Which metal is used for most electric wires at home? (a) plastic (b) rubber (c) glass (d) copper
10. 10.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
11. 11.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) wait and watch (b) pull them by the hand (c) pour water on them (d) shout for an adult
12. 12.⚠️ Which power source should children use for electronics projects? (a) a mains extension board (b) an inverter socket (c) a small battery pack (d) a wall socket
13. 13.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
14. 14.True or false: if a cell is taken out, the circuit is closed and current flows. (a) False (b) True
15. 15.Which of these is not safe? (a) stop if a part gets hot (b) poke things in a socket (c) use small battery cells (d) keep drinks far away
16. 16.Which of these is safe? (a) dry your hands first (b) climb an electric pole (c) poke things in a socket (d) touch a switch when wet
17. 17.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
18. 18.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
19. 19.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) bulb (b) switch (c) diode (d) motor
20. 20.🔁 Is the circuit closed or open if all wires are joined? (a) open (b) closed
21. 21.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
22. 22.🔘 Which kind of switch flips up or down? (a) a slide switch (b) a tilt switch (c) a reed switch (d) a toggle switch
23. 23.What does a slide switch do? (a) works only while pressed (b) flips up or down (c) stays where you flip it (d) slides side to side
24. 24.True or false: a ceramic cup is a conductor. (a) False (b) True
25. 25.Which drawing is the symbol for an ammeter? (a) a circle with a cross (b) a circle with A inside (c) a plain rectangle (d) two equal parallel lines
26. 26.Which of these mainly gives out light? (a) a torch (b) a water heater (c) a doorbell (d) a school bell
27. 27.True or false: a line lifted at a gap is the symbol for a switch. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) a plastic straw (b) a graphite rod (c) a paper strip (d) a wooden stick
29. 29.True or false: a dot where wires meet is the symbol for a battery. (a) False (b) True
30. 30.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
31. 31.🔍 Which is the odd one out? (a) a buzzer (b) a doorbell (c) a school bell (d) a mixer grinder
32. 32.🔍 Which is the odd one out? (a) use mains for a project (b) fly a kite near wires (c) dry your hands first (d) use a cable with cuts
33. 33.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False
34. 34.True or false: a push button slides side to side. (a) False (b) True
35. 35.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a bulb (c) a plug top (d) a fuse or MCB
36. 36.True or false: a slide switch slides side to side. (a) False (b) True
37. 37.True or false: a circle with an X in it is the symbol for a motor. (a) False (b) True
38. 38.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
39. 39.💡 In a series circuit, how many paths does the current have? (a) none (b) one for each bulb (c) one (d) two
40. 40.True or false: to stay away from pylons is not safe. (a) True (b) False

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