Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 209 · 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 open a phone charger is safe. (a) True (b) False
2. 2.Which of these uses electricity? (a) a battery (b) a cell (c) a power station (d) a mobile phone
3. 3.🔍 Which is the odd one out? (a) a rice cooker (b) an electric iron (c) a room heater (d) a ceiling fan
4. 4.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to make it colourful (d) to hide the circuit
5. 5.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
6. 6.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
7. 7.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 15 V (c) 0.5 V (d) 1.5 V
8. 8.💡 4 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
9. 9.True or false: a rubber eraser is a conductor. (a) False (b) True
10. 10.💡 4 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
11. 11.🔍 Which is the odd one out? (a) take cells out after use (b) fly kites in open fields (c) poke things in a socket (d) build with an adult near
12. 12.💡 6 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?
13. 13.True or false: to keep drinks far away is not safe. (a) True (b) False
14. 14.🔋 What is a battery? (a) two or more cells joined (b) one single wire (c) a switch with a lid (d) a kind of bulb
15. 15.Which of these is not safe? (a) keep drinks far away (b) climb an electric pole (c) stay away from pylons (d) fly kites in open fields
16. 16.🔍 Which is the odd one out? (a) touch a fallen wire (b) stay away from pylons (c) fly a kite near wires (d) use mains for a project
17. 17.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a conductor (c) a cell (d) a switch that is ON
18. 18.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 230 V (c) 9 V (d) 1.5 V
19. 19.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
20. 20.🔦 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
21. 21.Which drawing is the symbol for a wire? (a) a straight line (b) triangle against a bar (c) a circle with a cross (d) a circle with V inside
22. 22.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the filament (c) the switch (d) the base
23. 23.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
24. 24.🔍 Which is the odd one out? (a) open a phone charger (b) fly kites in open fields (c) stay away from pylons (d) stop if a part gets hot
25. 25.⚡ What does a table fan mainly change electricity into? (a) movement (b) light (c) heat (d) sound
26. 26.🔌 Is a plastic ruler a conductor or an insulator? (a) an insulator (b) a conductor
27. 27.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
28. 28.What does a slide switch do? (a) springs back when let go (b) closes near a magnet (c) flips up or down (d) slides side to side
29. 29.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are OFF (b) when either is ON (c) only when both are ON (d) never
30. 30.What does a tilt switch do? (a) flips up or down (b) stays where you flip it (c) works only while pressed (d) closes when tipped over
31. 31.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) resistor (c) wire (d) bulb
32. 32.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
33. 33.Which of these gives us electricity? (a) a television (b) a washing machine (c) a bicycle dynamo (d) a refrigerator
34. 34.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
35. 35.True or false: two equal parallel lines is the symbol for a capacitor. (a) True (b) False
36. 36.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
37. 37.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) movement energy (c) chemical energy (d) light energy
38. 38.💡 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?
39. 39.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
40. 40.True or false: “own switch for each bulb” is true of a series circuit. (a) True (b) False

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