Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 988 · 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 is the odd one out? (a) build with an adult near (b) open a phone charger (c) poke things in a socket (d) use a cable with cuts
2. 2.Which drawing is the symbol for a cell? (a) a long and a short line (b) two or more cell symbols (c) a circle with a cross (d) a circle with an X in it
3. 3.⚡ What does an electric iron mainly change electricity into? (a) sound (b) movement (c) heat (d) light
4. 4.⚡ What does a loudspeaker mainly change electricity into? (a) sound (b) heat (c) light (d) movement
5. 5.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
6. 6.⚠️ Is it safe to stop if a part gets hot? (a) not safe (b) safe
7. 7.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
8. 8.🔘 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 OFF. Does the bulb glow? (a) Yes (b) No
9. 9.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
10. 10.💡 5 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?
11. 11.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
12. 12.🔋 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)? =
13. 13.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) chemical energy (c) light energy (d) sound energy
14. 14.⚡ A fan changes electrical energy mainly into which kind of energy? (a) movement energy (b) sound energy (c) chemical energy (d) light energy
15. 15.💡 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. Bulbs 3 and 4 are taken out of their holders. Does bulb 1 glow? (a) Yes (b) No
16. 16.Which of these is not safe? (a) touch a fallen wire (b) use small battery cells (c) dry your hands first (d) stay away from pylons
17. 17.💡 4 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
18. 18.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a woollen thread across the gap. Does the bulb glow? (a) No (b) Yes
19. 19.True or false: if the bulb is unscrewed, the circuit is open and no current flows. (a) True (b) False
20. 20.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
21. 21.Which of these is safe? (a) open a phone charger (b) touch a switch when wet (c) use small battery cells (d) throw cells in a fire
22. 22.🔗 Series or parallel circuit: “one out, the rest glow”? (a) series (b) parallel
23. 23.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) an electric kettle (b) a room heater (c) a rice cooker (d) a doorbell
25. 25.💡 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?
26. 26.⚡ What does a tube light mainly change electricity into? (a) light (b) sound (c) movement (d) heat
27. 27.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the switch (b) the base (c) the filament (d) the glass
28. 28.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
29. 29.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 230 V (c) 15 V (d) 0.5 V
30. 30.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
31. 31.True or false: a tilt switch closes when tipped over. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a buzzer (b) a water heater (c) an electric kettle (d) a rice cooker
33. 33.Which of these is safe? (a) touch a fallen wire (b) touch a switch when wet (c) build with an adult near (d) use mains for a project
34. 34.🔋 What should you do with used-up cells? (a) give them for recycling (b) throw them in a fire (c) bury them in soil (d) cut them open
35. 35.✏️ In a circuit diagram, which part is drawn as many long-short pairs? (a) resistor (b) battery (c) cell (d) voltmeter
36. 36.🔋 5 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
37. 37.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
38. 38.True or false: a metal paper clip is a conductor. (a) True (b) False
39. 39.🔋 7 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)? =
40. 40.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a brass key. Does the bulb glow? (a) Yes (b) No

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