Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 864 · 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.💡 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?
2. 2.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
3. 3.🔋 2 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)? =
4. 4.⚡ What does an electric drill mainly change electricity into? (a) sound (b) movement (c) heat (d) light
5. 5.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
6. 6.🔋 8 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)? =
7. 7.True or false: a copper wire is a conductor. (a) False (b) True
8. 8.Which of these gives us electricity? (a) an air conditioner (b) a washing machine (c) a water pump (d) a solar panel
9. 9.🔘 A cell and a bulb are joined to two side-by-side paths: path 1 has switches A and B one after another, path 2 has switch C. A is OFF, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
10. 10.True or false: to fly a kite near wires is safe. (a) True (b) False
11. 11.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
12. 12.Which of these is not safe? (a) fly kites in open fields (b) build with an adult near (c) use small battery cells (d) open a phone charger
13. 13.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
14. 14.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) none (d) both of them
15. 15.🔍 Which is the odd one out? (a) a table fan (b) a traffic signal (c) an LED lamp (d) a tube light
16. 16.🔍 Which is the odd one out? (a) aluminium foil (b) a graphite rod (c) a rubber eraser (d) a brass key
17. 17.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) by Wi-Fi (d) in parallel
18. 18.🔋 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)? =
19. 19.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
20. 20.🔌 Most metals are good … (a) insulators (b) batteries (c) conductors (d) magnets only
21. 21.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
22. 22.Which of these is safe? (a) throw cells in a fire (b) poke things in a socket (c) use small battery cells (d) touch a fallen wire
23. 23.✏️ In a circuit diagram, which part is drawn as two or more cell symbols? (a) diode (b) LED (c) battery (d) resistor
24. 24.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
25. 25.⚡ What does an electric kettle mainly change electricity into? (a) movement (b) light (c) sound (d) heat
26. 26.Which of these is a conductor? (a) a ceramic cup (b) an iron nail (c) a dry cork (d) a woollen thread
27. 27.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
28. 28.Which of these is a conductor? (a) a woollen thread (b) a plastic ruler (c) a wooden stick (d) a brass key
29. 29.⚡ What does a ceiling fan mainly change electricity into? (a) sound (b) movement (c) heat (d) light
30. 30.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 12 V (c) 230 V (d) 1.5 V
31. 31.✏️ In a cell symbol, which line is the + terminal? (a) the longer line (b) the shorter line (c) both lines (d) neither line
32. 32.⚡ What does an electric toy car mainly change electricity into? (a) light (b) sound (c) heat (d) movement
33. 33.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
34. 34.🔋 Does a computer give electricity or use electricity? (a) uses electricity (b) gives electricity
35. 35.True or false: if the switch is OFF, the circuit is closed and current flows. (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.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
38. 38.True or false: to use small battery cells is not safe. (a) True (b) False
39. 39.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 5 of the switches are OFF and the rest are ON. How many bulbs glow?
40. 40.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) open (b) closed

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