Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 308 · 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.💡 2 identical bulbs are joined in series with a 4 V battery (ideal wires). How many volts does each bulb get? =
2. 2.Which of these uses electricity? (a) a solar panel (b) a washing machine (c) a battery (d) a bicycle dynamo
3. 3.💡 A battery lights 4 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
4. 4.Which of these is a conductor? (a) a plastic ruler (b) a dry cork (c) a safety pin (d) a plastic straw
5. 5.🔘 A bulb and a cell are joined through 5 switches on 5 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?
6. 6.🔍 Which is the odd one out? (a) an exhaust fan (b) an electric iron (c) a rice cooker (d) a toaster
7. 7.🔘 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 ON, B is ON and C is ON. Does the bulb glow? (a) No (b) Yes
8. 8.⚠️ Is it safe to use mains for a project? (a) safe (b) not safe
9. 9.True or false: a rubber eraser is a conductor. (a) False (b) True
10. 10.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
11. 11.Which of these is safe? (a) throw cells in a fire (b) stop if a part gets hot (c) climb an electric pole (d) fly a kite near wires
12. 12.True or false: a plastic ruler is a conductor. (a) True (b) False
13. 13.💡 3 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
14. 14.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
15. 15.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) throw them in a fire (d) bury them in soil
16. 16.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
17. 17.Which of these is a conductor? (a) a metal paper clip (b) a cotton thread (c) a rubber band (d) a wooden stick
18. 18.True or false: a brass key is a conductor. (a) False (b) True
19. 19.True or false: a room heater mainly gives out light. (a) False (b) True
20. 20.True or false: a reed switch slides side to side. (a) False (b) True
21. 21.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
23. 23.✏️ In a circuit diagram, which part is drawn as a straight line? (a) wire (b) resistor (c) capacitor (d) voltmeter
24. 24.What does a tilt switch do? (a) works only while pressed (b) closes when tipped over (c) stays where you flip it (d) slides side to side
25. 25.🔁 What must there be for a current to flow? (a) a plastic gap (b) a broken path (c) a complete loop (d) one loose end
26. 26.🔍 Which is the odd one out? (a) use mains for a project (b) fly a kite near wires (c) use small battery cells (d) throw cells in a fire
27. 27.True or false: a circle with M inside is the symbol for a wire. (a) True (b) False
28. 28.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
29. 29.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
30. 30.🔍 Which is the odd one out? (a) an LED lamp (b) a street light (c) a tube light (d) a mixer grinder
31. 31.True or false: to climb an electric pole is not safe. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) throw cells in a fire (b) fly kites in open fields (c) stay away from pylons (d) use small battery cells
33. 33.Which of these means the circuit is closed? (a) a cell is taken out (b) the switch is ON (c) the bulb is unscrewed (d) the switch is OFF
34. 34.🔘 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 OFF, B is OFF and C is OFF. Does the bulb glow? (a) No (b) Yes
35. 35.🔦 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
36. 36.Which of these is an insulator? (a) an iron nail (b) a rubber band (c) a steel coin (d) a copper wire
37. 37.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
38. 38.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
39. 39.💡 5 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 3 glow? (a) Yes (b) No
40. 40.🔦 A circuit has a used-up (dead) 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) No (b) Yes

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