Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 257 · 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.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 9 V (c) 1.5 V (d) 12 V
2. 2.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) never (c) only when both are OFF (d) only when both are ON
3. 3.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a fuse or MCB (b) a long wire (c) a plug top (d) a bulb
4. 4.🔋 What should you do with used-up cells? (a) bury them in soil (b) cut them open (c) give them for recycling (d) throw them in a fire
5. 5.Which drawing is the symbol for a capacitor? (a) many long-short pairs (b) a plain rectangle (c) two or more cell symbols (d) two equal parallel lines
6. 6.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
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 OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
8. 8.⚠️ Is it safe to fly kites in open fields? (a) not safe (b) safe
9. 9.🔌 Is a woollen thread a conductor or an insulator? (a) a conductor (b) an insulator
10. 10.🔍 Which is the odd one out? (a) a mixer grinder (b) a water heater (c) a ceiling fan (d) a table fan
11. 11.Which of these mainly makes sound? (a) a doorbell (b) a toaster (c) a tube light (d) a water heater
12. 12.🔍 Which is the odd one out? (a) a safety pin (b) a graphite rod (c) a woollen thread (d) a metal paper clip
13. 13.🔘 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 ON, B is OFF and C is OFF. Does the bulb glow? (a) Yes (b) No
14. 14.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
15. 15.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
16. 16.💡 3 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
17. 17.True or false: to fly a kite near wires is safe. (a) True (b) False
18. 18.🔘 When a switch is ON, the circuit is … (a) closed (b) open (c) broken (d) cut
19. 19.What does a tilt switch do? (a) closes near a magnet (b) closes when tipped over (c) flips up or down (d) springs back when let go
20. 20.🔦 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 woollen thread. Does the bulb glow? (a) Yes (b) No
21. 21.🔍 Which is the odd one out? (a) a rubber eraser (b) a safety pin (c) a steel coin (d) aluminium foil
22. 22.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a paper strip across the gap. Does the bulb glow? (a) No (b) Yes
23. 23.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) the longer line (d) both lines
24. 24.🔋 Does a refrigerator give electricity or use electricity? (a) uses electricity (b) gives electricity
25. 25.💡 5 identical bulbs are joined in series with a 5 V battery (ideal wires). How many volts does each bulb get? =
26. 26.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) never (c) when both are OFF (d) when both are ON
27. 27.Which drawing is the symbol for a cell? (a) triangle against a bar (b) a plain rectangle (c) a circle with V inside (d) a long and a short line
28. 28.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
29. 29.Which of these means the circuit is closed? (a) the switch is ON (b) the bulb is unscrewed (c) a wire has come loose (d) the switch is OFF
30. 30.Which of these is true of a series circuit? (a) a break stops every bulb (b) used in house wiring (c) each gets the full volts (d) many paths for current
31. 31.Which of these is an insulator? (a) a graphite rod (b) a copper wire (c) a woollen thread (d) a metal paper clip
32. 32.🔘 Which kind of switch closes near a magnet? (a) a slide switch (b) a reed switch (c) a tilt switch (d) a toggle switch
33. 33.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) none (b) only one (c) it does not matter (d) both of them
34. 34.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the steel shaft (c) the bare end (d) the plastic handle
35. 35.Which of these mainly makes movement? (a) a rice cooker (b) an electric iron (c) a table fan (d) a buzzer
36. 36.🔘 A bulb and a cell are joined through 3 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
37. 37.Which of these mainly makes sound? (a) an exhaust fan (b) an electric toy car (c) a night lamp (d) a buzzer
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a dry cork across the gap. Does the bulb glow? (a) No (b) Yes
39. 39.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a broken path (d) a complete loop
40. 40.🔦 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 an iron nail. Does the bulb glow? (a) No (b) Yes

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