Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 237 · 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: a circle with a cross is the symbol for an LED. (a) True (b) False
2. 2.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
3. 3.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
4. 4.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) in series (d) by Wi-Fi
5. 5.🔍 Which is the odd one out? (a) poke things in a socket (b) throw cells in a fire (c) climb an electric pole (d) stay away from pylons
6. 6.⚠️ Is it safe to fly a kite near wires? (a) not safe (b) safe
7. 7.💡 2 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
8. 8.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
9. 9.Which of these means the circuit is closed? (a) a wire has come loose (b) the loop is complete (c) the bulb is unscrewed (d) a cell is taken out
10. 10.True or false: “used in house wiring” is true of a series circuit. (a) False (b) True
11. 11.🔦 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) Yes (b) No
12. 12.Which of these gives us electricity? (a) a mobile phone (b) a generator (c) a television (d) a computer
13. 13.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
14. 14.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) battery (b) switch (c) motor (d) diode
15. 15.What does a toggle switch do? (a) stays where you flip it (b) springs back when let go (c) closes when tipped over (d) slides side to side
16. 16.💡 5 identical bulbs are in parallel and each bulb has its own switch on its path. 4 of the switches are OFF and the rest are ON. How many bulbs glow?
17. 17.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they keep glowing (d) they explode
18. 18.Which of these is not safe? (a) take cells out after use (b) fly kites in open fields (c) build with an adult near (d) fly a kite near wires
19. 19.🔍 Which is the odd one out? (a) a rubber band (b) a glass marble (c) a steel coin (d) a ceramic cup
20. 20.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
21. 21.Which of these is safe? (a) touch a fallen wire (b) poke things in a socket (c) use mains for a project (d) use small battery cells
22. 22.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
23. 23.Which of these means the circuit is open? (a) the switch is ON (b) all wires are joined (c) the loop is complete (d) a cell is taken out
24. 24.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 9 V (c) 1.5 V (d) 12 V
26. 26.True or false: aluminium foil is a conductor. (a) False (b) True
27. 27.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are OFF (c) when both are ON (d) when either is ON
28. 28.⚠️ Is it safe to build with an adult near? (a) not safe (b) safe
29. 29.Which drawing is the symbol for a battery? (a) a circle with M inside (b) a circle with a cross (c) triangle against a bar (d) many long-short pairs
30. 30.Which drawing is the symbol for a switch? (a) a line lifted at a gap (b) two or more cell symbols (c) many long-short pairs (d) one tall, one short bar
31. 31.True or false: a straight line is the symbol for a wire. (a) False (b) True
32. 32.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is ON, C is ON and D is OFF. Does the bulb glow? (a) Yes (b) No
33. 33.Which of these is not safe? (a) keep drinks far away (b) take cells out after use (c) dry your hands first (d) climb an electric pole
34. 34.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
35. 35.True or false: to keep drinks far away is not safe. (a) True (b) False
36. 36.True or false: a reed switch closes when tipped over. (a) True (b) False
37. 37.Which of these is true of a parallel circuit? (a) many paths for current (b) a single current path (c) one bulb out, all go out (d) bulbs share the voltage
38. 38.🔍 Which is the odd one out? (a) a metal paper clip (b) a safety pin (c) a rubber eraser (d) aluminium foil
39. 39.True or false: a table fan mainly makes movement. (a) False (b) True
40. 40.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids