Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 27 · 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 mainly makes movement? (a) an electric kettle (b) an electric iron (c) a table fan (d) a buzzer
2. 2.💡 A battery lights 3 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
3. 3.True or false: a small empty box is the symbol for a resistor. (a) True (b) False
4. 4.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 12 V (c) 1.5 V (d) 9 V
5. 5.🔍 Which is the odd one out? (a) use small battery cells (b) fly kites in open fields (c) throw cells in a fire (d) stay away from pylons
6. 6.Which of these is not safe? (a) touch a switch when wet (b) use small battery cells (c) stay away from pylons (d) fly kites in open fields
7. 7.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
8. 8.🔘 Two switches are in series. When does the bulb glow? (a) never (b) when both are ON (c) when either is ON (d) when both are OFF
9. 9.True or false: an electric toy car mainly makes movement. (a) False (b) True
10. 10.✏️ In a circuit diagram, which part is drawn as a long and a short line? (a) cell (b) voltmeter (c) motor (d) switch
11. 11.🔁 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
12. 12.🔍 Which is the odd one out? (a) an electric kettle (b) a buzzer (c) a siren (d) a doorbell
13. 13.🔋 How many 3 V cells must be joined in series to give 6 V?
14. 14.🔋 Does a water pump give electricity or use electricity? (a) uses electricity (b) gives electricity
15. 15.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) Yes (b) No
16. 16.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
17. 17.🔍 Which is the odd one out? (a) poke things in a socket (b) stay away from pylons (c) fly kites in open fields (d) take cells out after use
18. 18.Which of these is safe? (a) stay away from pylons (b) use mains for a project (c) poke things in a socket (d) touch a switch when wet
19. 19.⚡ What does a tube light mainly change electricity into? (a) movement (b) sound (c) light (d) heat
20. 20.💡 5 identical bulbs are joined in series with a 20 V battery (ideal wires). How many volts does each bulb get? =
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they all go out (d) they get dimmer
22. 22.🔘 A bulb and a cell are joined through 6 switches on 6 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?
23. 23.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
24. 24.💡 3 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. Bulb 1 is taken out of its holder. Does bulb 2 glow? (a) Yes (b) No
25. 25.Which of these means the circuit is closed? (a) a wire is cut (b) the loop is complete (c) the bulb is unscrewed (d) the switch is OFF
26. 26.True or false: a circle with an X in it is the symbol for a capacitor. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a rice cooker (b) a toaster (c) a room heater (d) an LED lamp
28. 28.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) one loose end (d) a plastic gap
29. 29.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) chemical energy (b) sound energy (c) light energy (d) movement energy
30. 30.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
31. 31.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
32. 32.💡 3 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?
33. 33.🔋 Does a power station give electricity or use electricity? (a) uses electricity (b) gives electricity
34. 34.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
35. 35.Which of these mainly gives out light? (a) a room heater (b) a doorbell (c) a traffic signal (d) a loudspeaker
36. 36.Which of these is a conductor? (a) a cotton thread (b) a metal paper clip (c) a woollen thread (d) a dry cork
37. 37.True or false: a tube light mainly makes movement. (a) False (b) True
38. 38.💡 3 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
39. 39.🔍 Which is the odd one out? (a) open a phone charger (b) stop if a part gets hot (c) fly a kite near wires (d) poke things in a socket
40. 40.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) cell (b) switch (c) voltmeter (d) battery

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