Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 230 · 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 drawing is the symbol for a diode? (a) a line lifted at a gap (b) a small empty box (c) triangle against a bar (d) two equal parallel lines
2. 2.💡 5 identical bulbs are in parallel and each one takes 0.2 A. What total current (in amperes) comes from the battery? =
3. 3.🔘 Which kind of switch closes when tipped over? (a) a reed switch (b) a slide switch (c) a toggle switch (d) a tilt switch
4. 4.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
5. 5.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
6. 6.True or false: a slide switch slides side to side. (a) True (b) False
7. 7.Which of these gives us electricity? (a) an air conditioner (b) a television (c) a solar panel (d) a water pump
8. 8.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) wavy lines (c) straight lines (d) dotted circles
9. 9.Which drawing is the symbol for a battery? (a) triangle, bar and arrows (b) a circle with a cross (c) many long-short pairs (d) two equal parallel lines
10. 10.🔋 Does a mobile phone give electricity or use electricity? (a) gives electricity (b) uses electricity
11. 11.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
12. 12.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
13. 13.Which of these uses electricity? (a) a cell (b) a computer (c) a battery (d) a power station
14. 14.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the switch (c) the base (d) the filament
15. 15.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) LED (b) battery (c) capacitor (d) cell
16. 16.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they keep glowing (c) they get dimmer (d) they explode
17. 17.🔦 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 wooden stick. Does the bulb glow? (a) Yes (b) No
18. 18.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
19. 19.Which of these is safe? (a) touch a switch when wet (b) use mains for a project (c) open a phone charger (d) use small battery cells
20. 20.Which of these is safe? (a) dry your hands first (b) poke things in a socket (c) open a phone charger (d) touch a switch when wet
21. 21.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
22. 22.Which of these uses electricity? (a) a battery (b) a television (c) a cell (d) a solar panel
23. 23.True or false: an electric drill mainly makes movement. (a) False (b) True
24. 24.Which of these means the circuit is open? (a) all wires are joined (b) the switch is ON (c) a cell is taken out (d) the loop is complete
25. 25.What does a toggle switch do? (a) works only while pressed (b) slides side to side (c) springs back when let go (d) flips up or down
26. 26.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) ammeter (b) diode (c) LED (d) resistor
27. 27.Which of these is a conductor? (a) a plastic ruler (b) a dry cork (c) aluminium foil (d) a plastic straw
28. 28.What does a reed switch do? (a) closes near a magnet (b) slides side to side (c) closes when tipped over (d) stays where you flip it
29. 29.🔁 What do we call a circuit with a break in it? (a) a full circuit (b) a closed circuit (c) an open circuit (d) a series circuit
30. 30.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 12 V (c) 230 V (d) 1.5 V
31. 31.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a long wire (c) a bulb (d) a fuse or MCB
32. 32.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
33. 33.Which of these is true of a series circuit? (a) own switch for each bulb (b) many paths for current (c) one out, the rest glow (d) a break stops every bulb
34. 34.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. Does bulb 4 glow? (a) No (b) Yes
35. 35.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
36. 36.🔘 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 OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
37. 37.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
38. 38.💡 4 identical bulbs are in parallel and each bulb has its own switch on its path. 3 of the switches are OFF and the rest are ON. How many bulbs glow?
39. 39.🔋 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
40. 40.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a glass marble. Does the bulb glow? (a) No (b) Yes

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