Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 636 · 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 it safe to throw cells in a fire? (a) safe (b) not safe
2. 2.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
3. 3.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
4. 4.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
5. 5.💡 A battery lights 5 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
6. 6.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a tilt switch (c) a toggle switch (d) a push button
7. 7.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) the same voltage (d) no voltage
8. 8.🔗 Series or parallel circuit: “own switch for each bulb”? (a) series (b) parallel
9. 9.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they explode (b) they keep glowing (c) they get dimmer (d) they all go out
10. 10.🔌 Is a safety pin a conductor or an insulator? (a) an insulator (b) a conductor
11. 11.What does a toggle switch do? (a) works only while pressed (b) slides side to side (c) closes near a magnet (d) flips up or down
12. 12.🔘 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 OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
13. 13.Which of these means the circuit is closed? (a) a wire has come loose (b) all wires are joined (c) the switch is OFF (d) the bulb is unscrewed
14. 14.⚡ What does an exhaust fan mainly change electricity into? (a) light (b) movement (c) heat (d) sound
15. 15.🔌 Is a copper wire a conductor or an insulator? (a) an insulator (b) a conductor
16. 16.🔗 Series or parallel circuit: “a single current path”? (a) parallel (b) series
17. 17.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a safety pin across the gap. Does the bulb glow? (a) Yes (b) No
18. 18.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.Which of these is safe? (a) throw cells in a fire (b) dry your hands first (c) touch a fallen wire (d) touch a switch when wet
20. 20.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the bare end (c) the steel shaft (d) the plastic handle
21. 21.🔋 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)? =
22. 22.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False
23. 23.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
24. 24.Which of these is an insulator? (a) a copper wire (b) a metal paper clip (c) a dry cork (d) a safety pin
25. 25.🔍 Which is the odd one out? (a) a rice cooker (b) a ceiling fan (c) a toaster (d) a water heater
26. 26.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 9 V (d) 230 V
27. 27.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
28. 28.✏️ In a circuit diagram, wires are usually drawn as … (a) wavy lines (b) little stars (c) dotted circles (d) straight lines
29. 29.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
30. 30.Which of these is true of a parallel circuit? (a) own switch for each bulb (b) a single current path (c) one bulb out, all go out (d) a break stops every bulb
31. 31.⚡ What do we call a flow of electric charge through a wire? (a) friction (b) electric current (c) a magnet (d) sound
32. 32.True or false: a push button flips up or down. (a) True (b) False
33. 33.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) water drops (c) photons (d) electrons
34. 34.💡 2 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
35. 35.💡 4 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?
36. 36.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
37. 37.Which drawing is the symbol for a battery? (a) one tall, one short bar (b) a plain rectangle (c) a small empty box (d) many long-short pairs
38. 38.Which of these gives us electricity? (a) a refrigerator (b) a mobile phone (c) a generator (d) an air conditioner
39. 39.🔍 Which is the odd one out? (a) build with an adult near (b) dry your hands first (c) take cells out after use (d) touch a switch when wet
40. 40.True or false: a reed switch flips up or down. (a) True (b) False

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