Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 707 · 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 is safe? (a) use a cable with cuts (b) poke things in a socket (c) climb an electric pole (d) build with an adult near
2. 2.⚡ A cell changes stored chemical energy into which kind of energy? (a) sound energy (b) electrical energy (c) wind energy (d) nuclear energy
3. 3.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
4. 4.🔍 Which is the odd one out? (a) a mixer grinder (b) an electric drill (c) a tube light (d) a ceiling fan
5. 5.True or false: an iron nail is an insulator. (a) True (b) False
6. 6.Which drawing is the symbol for a cell? (a) one tall, one short bar (b) a straight line (c) many long-short pairs (d) a plain rectangle
7. 7.Which of these is not safe? (a) keep drinks far away (b) use small battery cells (c) fly kites in open fields (d) poke things in a socket
8. 8.🔍 Which is the odd one out? (a) stop if a part gets hot (b) build with an adult near (c) use small battery cells (d) fly a kite near wires
9. 9.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
10. 10.⚡ What does an electric toy car mainly change electricity into? (a) sound (b) light (c) heat (d) movement
11. 11.True or false: “one out, the rest glow” is true of a parallel circuit. (a) True (b) False
12. 12.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
13. 13.🔋 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)? =
14. 14.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is ON, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
15. 15.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) both of them (d) it does not matter
16. 16.Which of these is an insulator? (a) a metal paper clip (b) a rubber eraser (c) an iron nail (d) a steel coin
17. 17.True or false: if the switch is ON, the circuit is open and no current flows. (a) True (b) False
18. 18.Which of these is not safe? (a) stop if a part gets hot (b) fly kites in open fields (c) dry your hands first (d) open a phone charger
19. 19.True or false: a slide switch springs back when let go. (a) False (b) True
20. 20.What does a toggle switch do? (a) works only while pressed (b) stays where you flip it (c) closes near a magnet (d) slides side to side
21. 21.Which of these means the circuit is closed? (a) the loop is complete (b) a wire has come loose (c) the bulb is unscrewed (d) the switch is OFF
22. 22.Which of these is true of a series circuit? (a) many paths for current (b) used in house wiring (c) one out, the rest glow (d) a single current path
23. 23.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
24. 24.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) it spoils the paint (c) water makes it cold (d) water carries current
25. 25.Which of these mainly gives out light? (a) a traffic signal (b) an electric kettle (c) a rice cooker (d) an electric toy car
26. 26.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) a dot where wires meet (c) a plain rectangle (d) triangle against a bar
27. 27.⚡ What does a table fan mainly change electricity into? (a) light (b) movement (c) heat (d) sound
28. 28.🔁 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
29. 29.🔗 Series or parallel circuit: “used in house wiring”? (a) parallel (b) series
30. 30.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
31. 31.Which of these means the circuit is closed? (a) a wire has come loose (b) all wires are joined (c) a cell is taken out (d) the bulb is unscrewed
32. 32.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
33. 33.Which of these mainly makes movement? (a) a room heater (b) a buzzer (c) an electric toy car (d) a tube light
34. 34.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
35. 35.🔌 Why are electric wires covered in plastic? (a) to make them heavy (b) plastic is a conductor (c) plastic makes current (d) plastic is an insulator
36. 36.🔍 Which is the odd one out? (a) take cells out after use (b) use mains for a project (c) use a cable with cuts (d) open a phone charger
37. 37.💡 3 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
38. 38.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
39. 39.What does a slide switch do? (a) slides side to side (b) springs back when let go (c) works only while pressed (d) stays where you flip it
40. 40.True or false: a tilt switch closes near a magnet. (a) True (b) False

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