Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 831 · 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 of these means the circuit is closed? (a) a cell is taken out (b) the switch is OFF (c) a wire is cut (d) all wires are joined
2. 2.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) voltmeter (b) resistor (c) cell (d) bulb
3. 3.🔍 Which is the odd one out? (a) a dry cork (b) a rubber eraser (c) an iron nail (d) a cotton thread
4. 4.🔍 Which is the odd one out? (a) build with an adult near (b) use mains for a project (c) climb an electric pole (d) poke things in a socket
5. 5.Which of these is an insulator? (a) a steel spoon (b) a metal paper clip (c) a paper strip (d) a safety pin
6. 6.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
7. 7.🔘 What does a switch do in a circuit? (a) makes electricity (b) opens or closes the loop (c) stores current (d) changes the voltage
8. 8.Which of these is not safe? (a) stop if a part gets hot (b) build with an adult near (c) fly kites in open fields (d) use mains for a project
9. 9.💡 4 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
10. 10.Which of these is not safe? (a) poke things in a socket (b) use small battery cells (c) keep drinks far away (d) build with an adult near
11. 11.🔗 Series or parallel circuit: “one out, the rest glow”? (a) parallel (b) series
12. 12.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 230 V (c) 1.5 V (d) 12 V
13. 13.Which of these mainly makes sound? (a) a doorbell (b) an electric toy car (c) an electric drill (d) a toaster
14. 14.🔋 Does a television give electricity or use electricity? (a) gives electricity (b) uses electricity
15. 15.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) the switch is OFF
16. 16.True or false: to stop if a part gets hot is safe. (a) False (b) True
17. 17.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
18. 18.Which of these is safe? (a) build with an adult near (b) open a phone charger (c) use a cable with cuts (d) touch a fallen wire
19. 19.Which drawing is the symbol for a diode? (a) a dot where wires meet (b) triangle against a bar (c) one tall, one short bar (d) a circle with A inside
20. 20.Which of these is an insulator? (a) an iron nail (b) aluminium foil (c) a plastic straw (d) a safety pin
21. 21.🔁 Is the circuit closed or open if the switch is OFF? (a) closed (b) open
22. 22.🔍 Which is the odd one out? (a) a metal paper clip (b) an iron nail (c) a glass marble (d) a graphite rod
23. 23.💡 In a series circuit, how many paths does the current have? (a) two (b) one for each bulb (c) none (d) one
24. 24.💡 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
25. 25.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a reed switch (c) a slide switch (d) a tilt switch
26. 26.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) movement energy (b) sound energy (c) light energy (d) chemical energy
27. 27.🔘 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) No (b) Yes
28. 28.True or false: “one out, the rest glow” is true of a series circuit. (a) True (b) False
29. 29.✏️ In a circuit diagram, which part is drawn as triangle, bar and arrows? (a) cell (b) ammeter (c) switch (d) LED
30. 30.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) Yes (b) No
31. 31.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the glass (c) the switch (d) the filament
32. 32.What does a slide switch do? (a) works only while pressed (b) slides side to side (c) springs back when let go (d) flips up or down
33. 33.True or false: a small empty box is the symbol for a diode. (a) False (b) True
34. 34.🔋 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)? =
35. 35.🔌 Is aluminium foil a conductor or an insulator? (a) a conductor (b) an insulator
36. 36.✏️ In a circuit diagram, which part is drawn as a straight line? (a) LED (b) voltmeter (c) wire (d) junction
37. 37.⚠️ Is it safe to use small battery cells? (a) safe (b) not safe
38. 38.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a safe circuit (c) a short circuit (d) an open circuit
39. 39.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
40. 40.⚡ A solar panel changes which kind of energy into electricity? (a) chemical energy (b) wind energy (c) light energy (d) sound energy

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