Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 397 · 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 ruler a conductor or an insulator? (a) a conductor (b) an insulator
2. 2.💡 4 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) No (b) Yes
3. 3.True or false: “many paths for current” is true of a series circuit. (a) True (b) False
4. 4.True or false: a steel spoon is an insulator. (a) True (b) False
5. 5.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) LED (b) wire (c) diode (d) resistor
6. 6.True or false: a tilt switch springs back when let go. (a) True (b) False
7. 7.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) Yes (b) No
8. 8.🔍 Which is the odd one out? (a) open a phone charger (b) fly a kite near wires (c) poke things in a socket (d) take cells out after use
9. 9.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a toggle switch (c) a tilt switch (d) a push button
10. 10.Which drawing is the symbol for a cell? (a) two equal parallel lines (b) a circle with M inside (c) one tall, one short bar (d) triangle against a bar
11. 11.🔘 A bulb and a cell are joined through 2 switches on 2 side-by-side paths, one switch on each path (parallel). What is the smallest number of switches that must be ON to light the bulb?
12. 12.🔘 Which kind of switch closes when tipped over? (a) a tilt switch (b) a toggle switch (c) a reed switch (d) a push button
13. 13.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) two (c) one (d) none
14. 14.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
15. 15.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) by Wi-Fi (c) not joined (d) in parallel
16. 16.True or false: a circle with a cross is the symbol for a bulb. (a) True (b) False
17. 17.Which of these mainly makes movement? (a) an electric iron (b) a mixer grinder (c) a toaster (d) an electric kettle
18. 18.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
20. 20.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
21. 21.✏️ In a circuit diagram, wires are usually drawn as … (a) straight lines (b) little stars (c) dotted circles (d) wavy lines
22. 22.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a safe circuit (d) a short circuit
23. 23.🔘 A cell and a bulb are joined to 3 side-by-side paths with one switch on each path — A, B and C (parallel). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
24. 24.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the plastic handle (c) the steel shaft (d) the metal tip
25. 25.True or false: a circle with V inside is the symbol for a capacitor. (a) True (b) False
26. 26.💡 A battery lights 3 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
27. 27.🔌 Is a cotton thread a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.Which of these is true of a series circuit? (a) one out, the rest glow (b) each gets the full volts (c) own switch for each bulb (d) bulbs share the voltage
29. 29.True or false: an LED lamp mainly makes movement. (a) False (b) True
30. 30.Which of these is a conductor? (a) a ceramic cup (b) an iron nail (c) a woollen thread (d) a paper strip
31. 31.💡 3 identical bulbs are joined in series with a 4.5 V battery (ideal wires). How many volts does each bulb get? =
32. 32.Which of these mainly makes movement? (a) a buzzer (b) a ceiling fan (c) an electric iron (d) a street light
33. 33.Which drawing is the symbol for a motor? (a) one tall, one short bar (b) many long-short pairs (c) a straight line (d) a circle with M inside
34. 34.Which of these is safe? (a) use a cable with cuts (b) poke things in a socket (c) touch a switch when wet (d) dry your hands first
35. 35.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.Which of these means the circuit is closed? (a) a cell is taken out (b) a wire is cut (c) the switch is OFF (d) the switch is ON
37. 37.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 12 V (d) 230 V
38. 38.💡 5 identical bulbs are joined in parallel across a 1.5 V battery (ideal wires). How many volts does each bulb get? =
39. 39.⚠️ Is it safe to touch a fallen wire? (a) safe (b) not safe
40. 40.🔍 Which is the odd one out? (a) a safety pin (b) a steel spoon (c) a paper strip (d) a metal paper clip

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