Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 961 · 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.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) the same (c) dimmer
2. 2.Which of these gives us electricity? (a) a television (b) a wind turbine (c) a refrigerator (d) a washing machine
3. 3.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a long wire (d) a fuse or MCB
4. 4.🔘 When a switch is ON, the circuit is … (a) open (b) cut (c) broken (d) closed
5. 5.Which of these mainly makes sound? (a) a tube light (b) a water heater (c) a rice cooker (d) a doorbell
6. 6.🔘 Which kind of switch stays where you flip it? (a) a slide switch (b) a tilt switch (c) a toggle switch (d) a reed switch
7. 7.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
8. 8.🔌 Is a plastic ruler a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
10. 10.Which of these is safe? (a) open a phone charger (b) use a cable with cuts (c) fly a kite near wires (d) dry your hands first
11. 11.💡 4 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
12. 12.Which drawing is the symbol for a bulb? (a) a long and a short line (b) two or more cell symbols (c) a dot where wires meet (d) a circle with an X in it
13. 13.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
14. 14.⚡ What does a torch mainly change electricity into? (a) heat (b) sound (c) light (d) movement
15. 15.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
16. 16.💡 4 identical bulbs are in parallel and each one takes 1 A. What total current (in amperes) comes from the battery? =
17. 17.Which of these is not safe? (a) use small battery cells (b) build with an adult near (c) keep drinks far away (d) use mains for a project
18. 18.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
19. 19.Which of these is safe? (a) fly kites in open fields (b) throw cells in a fire (c) climb an electric pole (d) touch a switch when wet
20. 20.🔁 What do we call a circuit with a break in it? (a) an open circuit (b) a full circuit (c) a closed circuit (d) a series circuit
21. 21.True or false: a toggle switch works only while pressed. (a) True (b) False
22. 22.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) never (b) when either is ON (c) only when both are OFF (d) only when both are ON
23. 23.⚠️ Is it safe to poke things in a socket? (a) not safe (b) safe
24. 24.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) the same voltage (d) double the voltage
25. 25.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
26. 26.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
27. 27.Which drawing is the symbol for a diode? (a) one tall, one short bar (b) triangle against a bar (c) a straight line (d) a circle with an X in it
28. 28.⚡ What does an electric drill mainly change electricity into? (a) sound (b) movement (c) heat (d) light
29. 29.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
30. 30.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
31. 31.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) diode (b) cell (c) bulb (d) resistor
32. 32.⚡ What does an exhaust fan mainly change electricity into? (a) movement (b) light (c) heat (d) sound
33. 33.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) wavy lines (c) little stars (d) dotted circles
34. 34.Which of these is safe? (a) open a phone charger (b) stay away from pylons (c) use mains for a project (d) use a cable with cuts
35. 35.🔋 Does a wind turbine give electricity or use electricity? (a) uses electricity (b) gives electricity
36. 36.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) bury them in soil (d) throw them in a fire
37. 37.Which of these mainly makes sound? (a) a table fan (b) a water heater (c) a buzzer (d) a torch
38. 38.⚡ What does a buzzer mainly change electricity into? (a) heat (b) movement (c) sound (d) light
39. 39.🔘 A cell and a bulb are joined to 4 side-by-side paths with one switch on each path — A, B, C and D (parallel). A is OFF, B is OFF, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
40. 40.🔍 Which is the odd one out? (a) stay away from pylons (b) poke things in a socket (c) build with an adult near (d) dry your hands first

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