Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 907 · 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.Which of these means the circuit is closed? (a) the switch is ON (b) the switch is OFF (c) a wire has come loose (d) the bulb is unscrewed
2. 2.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they all go out (c) they keep glowing (d) they get dimmer
3. 3.Which of these gives us electricity? (a) a cell (b) a computer (c) a water pump (d) an air conditioner
4. 4.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) nobody (c) a trusted adult (d) a younger child
5. 5.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
6. 6.🔍 Which is the odd one out? (a) climb an electric pole (b) throw cells in a fire (c) take cells out after use (d) touch a switch when wet
7. 7.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
8. 8.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
9. 9.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is OFF, B is OFF, C is OFF and D is ON. Does the bulb glow? (a) Yes (b) No
10. 10.🔋 4 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
11. 11.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
12. 12.True or false: to build with an adult near is not safe. (a) False (b) True
13. 13.True or false: a small empty box is the symbol for a switch. (a) False (b) True
14. 14.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) battery (b) cell (c) ammeter (d) bulb
15. 15.Which of these is not safe? (a) stop if a part gets hot (b) stay away from pylons (c) dry your hands first (d) fly a kite near wires
16. 16.🔌 Is aluminium foil a conductor or an insulator? (a) an insulator (b) a conductor
17. 17.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
18. 18.💡 4 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
19. 19.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
20. 20.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
21. 21.What does a toggle switch do? (a) works only while pressed (b) closes near a magnet (c) stays where you flip it (d) closes when tipped over
22. 22.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is an insulator (c) plastic makes current (d) plastic is a conductor
23. 23.🔍 Which is the odd one out? (a) fly kites in open fields (b) build with an adult near (c) dry your hands first (d) touch a switch when wet
24. 24.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
25. 25.Which of these mainly gives out light? (a) a loudspeaker (b) a tube light (c) an exhaust fan (d) a school bell
26. 26.🔋 4 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)? =
27. 27.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
28. 28.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) sound (c) heat (d) light
29. 29.🔍 Which is the odd one out? (a) a plastic ruler (b) an iron nail (c) a glass marble (d) a rubber band
30. 30.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
31. 31.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
32. 32.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
33. 33.What does a tilt switch do? (a) closes near a magnet (b) springs back when let go (c) closes when tipped over (d) works only while pressed
34. 34.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
35. 35.Which drawing is the symbol for a voltmeter? (a) two or more cell symbols (b) a circle with V inside (c) many long-short pairs (d) a plain rectangle
36. 36.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
37. 37.True or false: “bulbs share the voltage” is true of a series circuit. (a) False (b) True
38. 38.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) diode (b) voltmeter (c) wire (d) cell
39. 39.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a plug top (c) a bulb (d) a fuse or MCB
40. 40.🔍 Which is the odd one out? (a) a traffic signal (b) a street light (c) an LED lamp (d) a water heater

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