Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 799 · 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 keep drinks far away is safe. (a) True (b) False
2. 2.Which of these is not safe? (a) stop if a part gets hot (b) dry your hands first (c) take cells out after use (d) fly a kite near wires
3. 3.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a fuse or MCB (c) a long wire (d) a plug top
4. 4.🔍 Which is the odd one out? (a) use mains for a project (b) climb an electric pole (c) poke things in a socket (d) stop if a part gets hot
5. 5.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) a torch (b) a tube light (c) a buzzer (d) an LED lamp
7. 7.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 230 V (d) 12 V
8. 8.⚡ What does a torch mainly change electricity into? (a) light (b) heat (c) sound (d) movement
9. 9.🔍 Which is the odd one out? (a) a steel spoon (b) a copper wire (c) a dry cork (d) a graphite rod
10. 10.🔍 Which is the odd one out? (a) keep drinks far away (b) climb an electric pole (c) stop if a part gets hot (d) fly kites in open fields
11. 11.💡 5 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?
12. 12.Which of these means the circuit is open? (a) a wire is cut (b) the loop is complete (c) all wires are joined (d) the switch is ON
13. 13.True or false: to build with an adult near is not safe. (a) True (b) False
14. 14.Which of these mainly makes movement? (a) a buzzer (b) a tube light (c) an electric kettle (d) a table fan
15. 15.💡 3 identical bulbs are in parallel and each one takes 1.5 A. What total current (in amperes) comes from the battery? =
16. 16.🔍 Which is the odd one out? (a) touch a fallen wire (b) throw cells in a fire (c) fly a kite near wires (d) fly kites in open fields
17. 17.Which drawing is the symbol for a junction? (a) a small empty box (b) a dot where wires meet (c) two or more cell symbols (d) a circle with V inside
18. 18.Which of these is safe? (a) throw cells in a fire (b) poke things in a socket (c) use mains for a project (d) take cells out after use
19. 19.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pour water on them (b) wait and watch (c) shout for an adult (d) pull them by the hand
20. 20.Which of these mainly gives out light? (a) a doorbell (b) a rice cooker (c) a ceiling fan (d) an LED lamp
21. 21.🔘 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 OFF, B is OFF and C is ON. Does the bulb glow? (a) Yes (b) No
22. 22.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
23. 23.Which of these is true of a parallel circuit? (a) used in house wiring (b) bulbs share the voltage (c) a single current path (d) a break stops every bulb
24. 24.⚠️ Is it safe to climb an electric pole? (a) safe (b) not safe
25. 25.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
26. 26.What does a toggle switch do? (a) springs back when let go (b) closes when tipped over (c) flips up or down (d) closes near a magnet
27. 27.🔘 Which kind of switch flips up or down? (a) a push button (b) a reed switch (c) a toggle switch (d) a tilt switch
28. 28.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) bulb (b) motor (c) diode (d) battery
29. 29.Which of these is safe? (a) open a phone charger (b) fly kites in open fields (c) use mains for a project (d) poke things in a socket
30. 30.🔋 5 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
31. 31.🔁 What must there be for a current to flow? (a) a broken path (b) a complete loop (c) a plastic gap (d) one loose end
32. 32.🔦 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
33. 33.💡 2 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
34. 34.Which of these mainly makes movement? (a) an LED lamp (b) an electric iron (c) an electric toy car (d) a doorbell
35. 35.True or false: a tilt switch stays where you flip it. (a) False (b) True
36. 36.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
37. 37.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
38. 38.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) fly kites in open fields (b) stay away from pylons (c) touch a switch when wet (d) take cells out after use
40. 40.🔘 When a switch is ON, the circuit is … (a) cut (b) open (c) closed (d) broken

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