Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 572 · 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.🔌 Is a plastic straw a conductor or an insulator? (a) an insulator (b) a conductor
2. 2.True or false: “a single current path” is true of a parallel circuit. (a) False (b) True
3. 3.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
4. 4.🔌 Most metals are good … (a) insulators (b) magnets only (c) conductors (d) batteries
5. 5.🔘 What does a switch do in a circuit? (a) changes the voltage (b) stores current (c) opens or closes the loop (d) makes electricity
6. 6.🔘 A bulb and a cell are joined through 5 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
7. 7.🔦 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
8. 8.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic straw (c) a rubber band (d) a graphite rod
9. 9.Which of these mainly makes sound? (a) an LED lamp (b) a ceiling fan (c) a siren (d) an electric iron
10. 10.Which of these is a conductor? (a) a wooden stick (b) a cotton thread (c) a glass marble (d) a steel spoon
11. 11.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) LED (b) cell (c) bulb (d) voltmeter
12. 12.💡 2 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. Bulb 1 is taken out of its holder. How many bulbs glow?
13. 13.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
14. 14.🔍 Which is the odd one out? (a) keep drinks far away (b) stop if a part gets hot (c) fly kites in open fields (d) fly a kite near wires
15. 15.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
16. 16.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
17. 17.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
18. 18.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the filament (d) the base
19. 19.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
20. 20.🔘 Which kind of switch stays where you flip it? (a) a push button (b) a slide switch (c) a tilt switch (d) a toggle switch
21. 21.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
22. 22.✏️ In a circuit diagram, which part is drawn as a plain rectangle? (a) ammeter (b) cell (c) resistor (d) bulb
23. 23.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
24. 24.True or false: a toggle switch stays where you flip it. (a) False (b) True
25. 25.Which drawing is the symbol for an ammeter? (a) a circle with A inside (b) a dot where wires meet (c) one tall, one short bar (d) a circle with an X in it
26. 26.True or false: to take cells out after use is not safe. (a) True (b) False
27. 27.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) dotted circles (d) wavy lines
28. 28.Which of these uses electricity? (a) a wind turbine (b) a battery (c) a cell (d) a television
29. 29.💡 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?
30. 30.⚠️ Is it safe to poke things in a socket? (a) safe (b) not safe
31. 31.💡 4 identical bulbs are joined in parallel across a 4.5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a bulb (c) a long wire (d) a fuse or MCB
33. 33.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
34. 34.💡 2 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) No (b) Yes
35. 35.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
36. 36.Which of these means the circuit is closed? (a) the switch is OFF (b) the bulb is unscrewed (c) a cell is taken out (d) all wires are joined
37. 37.True or false: to open a phone charger is safe. (a) True (b) False
38. 38.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) LED (c) battery (d) cell
39. 39.⚡ What does a mixer grinder mainly change electricity into? (a) sound (b) heat (c) movement (d) light
40. 40.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)

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