Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 574 · 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.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
2. 2.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a tilt switch (c) a reed switch (d) a push button
3. 3.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) an open circuit (d) a full circuit
4. 4.⚠️ Who should be with you when you build a circuit? (a) a stranger online (b) a younger child (c) nobody (d) a trusted adult
5. 5.Which of these uses electricity? (a) a power station (b) a battery (c) a television (d) a solar panel
6. 6.Which drawing is the symbol for a capacitor? (a) many long-short pairs (b) a dot where wires meet (c) a circle with a cross (d) two equal parallel lines
7. 7.⚡ A solar panel changes which kind of energy into electricity? (a) light energy (b) wind energy (c) chemical energy (d) sound energy
8. 8.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
9. 9.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
10. 10.⚡ What do we call a flow of electric charge through a wire? (a) a magnet (b) sound (c) electric current (d) friction
11. 11.Which drawing is the symbol for a cell? (a) a dot where wires meet (b) a small empty box (c) one tall, one short bar (d) a circle with M inside
12. 12.🔋 3 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)? =
13. 13.🔘 When a switch is ON, the circuit is … (a) broken (b) cut (c) open (d) closed
14. 14.⚡ A fan changes electrical energy mainly into which kind of energy? (a) sound energy (b) chemical energy (c) movement energy (d) light energy
15. 15.Which of these is true of a series circuit? (a) own switch for each bulb (b) used in house wiring (c) one bulb out, all go out (d) one out, the rest glow
16. 16.Which of these means the circuit is closed? (a) the switch is OFF (b) the loop is complete (c) a wire is cut (d) the bulb is unscrewed
17. 17.🔋 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)? =
18. 18.Which of these is not safe? (a) dry your hands first (b) fly a kite near wires (c) stop if a part gets hot (d) stay away from pylons
19. 19.🔍 Which is the odd one out? (a) a graphite rod (b) a steel spoon (c) a plastic straw (d) an iron nail
20. 20.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
21. 21.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) a steel coin (b) a glass marble (c) a brass key (d) a graphite rod
23. 23.True or false: a reed switch stays where you flip it. (a) False (b) True
24. 24.True or false: a toggle switch works only while pressed. (a) True (b) False
25. 25.Which of these is an insulator? (a) aluminium foil (b) a brass key (c) a steel spoon (d) a cotton thread
26. 26.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
27. 27.🔍 Which is the odd one out? (a) touch a fallen wire (b) dry your hands first (c) keep drinks far away (d) stop if a part gets hot
28. 28.True or false: a loudspeaker mainly makes sound. (a) True (b) False
29. 29.💡 2 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
30. 30.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) capacitor (b) battery (c) voltmeter (d) bulb
31. 31.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) wire (b) resistor (c) switch (d) diode
32. 32.Which of these is not safe? (a) take cells out after use (b) fly kites in open fields (c) open a phone charger (d) stay away from pylons
33. 33.💡 6 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?
34. 34.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
35. 35.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
36. 36.Which drawing is the symbol for a diode? (a) a circle with M inside (b) a small empty box (c) triangle, bar and arrows (d) triangle against a bar
37. 37.True or false: one tall, one short bar is the symbol for a cell. (a) False (b) True
38. 38.🔋 What is a battery? (a) two or more cells joined (b) a kind of bulb (c) a switch with a lid (d) one single wire
39. 39.Which of these gives us electricity? (a) a wind turbine (b) an air conditioner (c) a mobile phone (d) a computer
40. 40.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the base (c) the glass (d) the switch

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