Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 42 · 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: to dry your hands first is not safe. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) use small battery cells (b) touch a fallen wire (c) build with an adult near (d) stay away from pylons
3. 3.🔘 Two switches are in series. When does the bulb glow? (a) when both are OFF (b) when either is ON (c) never (d) when both are ON
4. 4.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
5. 5.True or false: a siren mainly makes sound. (a) True (b) False
6. 6.💡 4 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?
7. 7.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
8. 8.🔍 Which is the odd one out? (a) fly a kite near wires (b) take cells out after use (c) dry your hands first (d) build with an adult near
9. 9.Which of these is an insulator? (a) a steel spoon (b) an iron nail (c) a rubber band (d) a safety pin
10. 10.Which of these is safe? (a) climb an electric pole (b) stop if a part gets hot (c) use a cable with cuts (d) use mains for a project
11. 11.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
12. 12.Which of these is true of a parallel circuit? (a) a single current path (b) a break stops every bulb (c) bulbs share the voltage (d) each gets the full volts
13. 13.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
15. 15.🔋 Does a power station give electricity or use electricity? (a) gives electricity (b) uses electricity
16. 16.Which of these is safe? (a) poke things in a socket (b) use mains for a project (c) fly kites in open fields (d) touch a fallen wire
17. 17.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.True or false: “one out, the rest glow” is true of a parallel circuit. (a) False (b) True
19. 19.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.💡 6 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?
21. 21.Which of these is not safe? (a) open a phone charger (b) build with an adult near (c) use small battery cells (d) fly kites in open fields
22. 22.True or false: a steel coin is an insulator. (a) False (b) True
23. 23.True or false: a push button works only while pressed. (a) False (b) True
24. 24.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a copper wire (b) a rubber eraser (c) a rubber band (d) a dry cork
26. 26.True or false: a circle with V inside is the symbol for a voltmeter. (a) True (b) False
27. 27.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) an open circuit (d) a series circuit
28. 28.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) wire (b) diode (c) cell (d) LED
29. 29.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
30. 30.💡 3 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
31. 31.🔍 Which is the odd one out? (a) a table fan (b) a night lamp (c) a tube light (d) a traffic signal
32. 32.Which of these means the circuit is closed? (a) a wire is cut (b) the bulb is unscrewed (c) a wire has come loose (d) the switch is ON
33. 33.🔍 Which is the odd one out? (a) build with an adult near (b) stop if a part gets hot (c) poke things in a socket (d) fly kites in open fields
34. 34.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
35. 35.True or false: “used in house wiring” is true of a series circuit. (a) True (b) False
36. 36.✏️ Why do engineers draw circuits with symbols? (a) to hide the circuit (b) symbols are heavier (c) to make it colourful (d) quick and clear for all
37. 37.🔍 Which is the odd one out? (a) a copper wire (b) a graphite rod (c) a steel spoon (d) a wooden stick
38. 38.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) diode (c) motor (d) resistor
39. 39.Which drawing is the symbol for a bulb? (a) a circle with M inside (b) a straight line (c) a circle with a cross (d) two or more cell symbols
40. 40.⚠️ Is it safe to dry your hands first? (a) safe (b) not safe

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