Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 357 · 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.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
2. 2.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
3. 3.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
4. 4.Which of these is safe? (a) dry your hands first (b) open a phone charger (c) use a cable with cuts (d) climb an electric pole
5. 5.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
6. 6.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a bulb (c) a plug top (d) a long wire
7. 7.What does a slide switch do? (a) flips up or down (b) stays where you flip it (c) slides side to side (d) springs back when let go
8. 8.Which of these mainly gives out light? (a) a water heater (b) a night lamp (c) a siren (d) an electric toy car
9. 9.True or false: a push button springs back when let go. (a) False (b) True
10. 10.True or false: an electric iron mainly gives out heat. (a) True (b) False
11. 11.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
12. 12.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
13. 13.🔁 Is the circuit closed or open if the loop is complete? (a) closed (b) open
14. 14.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) dotted circles (d) straight lines
15. 15.🔍 Which is the odd one out? (a) open a phone charger (b) climb an electric pole (c) dry your hands first (d) touch a switch when wet
16. 16.✏️ Why do engineers draw circuits with symbols? (a) quick and clear for all (b) symbols are heavier (c) to hide the circuit (d) to make it colourful
17. 17.🔍 Which is the odd one out? (a) stay away from pylons (b) fly a kite near wires (c) touch a switch when wet (d) touch a fallen wire
18. 18.Which of these is a conductor? (a) an iron nail (b) a wooden stick (c) a rubber eraser (d) a woollen thread
19. 19.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe
20. 20.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
21. 21.Which of these is true of a parallel circuit? (a) one bulb out, all go out (b) a break stops every bulb (c) own switch for each bulb (d) bulbs share the voltage
22. 22.True or false: an electric kettle mainly gives out heat. (a) False (b) True
23. 23.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
24. 24.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
25. 25.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a push button (c) a slide switch (d) a reed switch
26. 26.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they get dimmer (c) they keep glowing (d) they all go out
27. 27.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
28. 28.🔁 What must there be for a current to flow? (a) one loose end (b) a broken path (c) a complete loop (d) a plastic gap
29. 29.True or false: “one out, the rest glow” is true of a series circuit. (a) False (b) True
30. 30.🔁 What do we call a circuit with a break in it? (a) a series circuit (b) an open circuit (c) a full circuit (d) a closed circuit
31. 31.Which drawing is the symbol for a switch? (a) two or more cell symbols (b) many long-short pairs (c) a long and a short line (d) a line lifted at a gap
32. 32.🔘 A bulb and a cell are joined through 4 switches on 4 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
33. 33.🔋 5 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
34. 34.Which drawing is the symbol for a resistor? (a) a straight line (b) two equal parallel lines (c) a circle with M inside (d) a plain rectangle
35. 35.True or false: a street light mainly makes movement. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) stay away from pylons (b) use a cable with cuts (c) take cells out after use (d) build with an adult near
37. 37.True or false: a circle with a cross is the symbol for a capacitor. (a) True (b) False
38. 38.🔋 3 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)? =
39. 39.⚡ What does a night lamp mainly change electricity into? (a) sound (b) movement (c) heat (d) light
40. 40.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) a single current path (d) each gets the full volts

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