Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 166 · 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.True or false: a reed switch works only while pressed. (a) True (b) False
2. 2.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
3. 3.⚡ A solar panel changes which kind of energy into electricity? (a) sound energy (b) chemical energy (c) wind energy (d) light energy
4. 4.Which of these mainly makes sound? (a) a toaster (b) a tube light (c) a school bell (d) a mixer grinder
5. 5.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
6. 6.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) so all go off together (c) each gets full voltage (d) to save copper only
7. 7.⚡ What does a toaster mainly change electricity into? (a) light (b) sound (c) heat (d) movement
8. 8.🔘 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
9. 9.True or false: a siren mainly makes movement. (a) False (b) True
10. 10.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
11. 11.🔋 Does a washing machine give electricity or use electricity? (a) uses electricity (b) gives electricity
12. 12.Which of these mainly makes sound? (a) an exhaust fan (b) a water heater (c) an electric drill (d) a buzzer
13. 13.Which of these mainly gives out heat? (a) an electric iron (b) a doorbell (c) a street light (d) an LED lamp
14. 14.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
15. 15.🔍 Which is the odd one out? (a) use mains for a project (b) fly a kite near wires (c) poke things in a socket (d) build with an adult near
16. 16.True or false: a toggle switch flips up or down. (a) True (b) False
17. 17.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
18. 18.True or false: “own switch for each bulb” is true of a parallel circuit. (a) False (b) True
19. 19.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
20. 20.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) neither line (c) both lines (d) the longer line
21. 21.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) battery (b) cell (c) resistor (d) diode
22. 22.Which of these is true of a series circuit? (a) many paths for current (b) one out, the rest glow (c) own switch for each bulb (d) a break stops every bulb
23. 23.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
24. 24.True or false: if the switch is ON, the circuit is closed and current flows. (a) True (b) False
25. 25.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they get dimmer (c) they explode (d) they keep glowing
26. 26.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) it does not matter (c) only one (d) none
27. 27.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) Yes (b) No
28. 28.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
29. 29.True or false: “one bulb out, all go out” is true of a series circuit. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) fly a kite near wires (b) touch a fallen wire (c) use small battery cells (d) touch a switch when wet
31. 31.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) resistor (b) switch (c) bulb (d) voltmeter
32. 32.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is ON and B is ON. Does the bulb glow? (a) No (b) Yes
33. 33.True or false: an exhaust fan mainly makes sound. (a) False (b) True
34. 34.Which of these is not safe? (a) fly kites in open fields (b) use mains for a project (c) stop if a part gets hot (d) take cells out after use
35. 35.🔘 When a switch is ON, the circuit is … (a) broken (b) closed (c) open (d) cut
36. 36.What does a reed switch do? (a) works only while pressed (b) closes near a magnet (c) slides side to side (d) springs back when let go
37. 37.Which of these is an insulator? (a) a steel coin (b) an iron nail (c) a metal paper clip (d) a dry cork
38. 38.🔍 Which is the odd one out? (a) fly kites in open fields (b) keep drinks far away (c) poke things in a socket (d) take cells out after use
39. 39.Which of these means the circuit is open? (a) all wires are joined (b) the switch is OFF (c) the loop is complete (d) the switch is ON
40. 40.True or false: a night lamp mainly gives out light. (a) True (b) False

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