Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 943 · 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.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
2. 2.🔍 Which is the odd one out? (a) use mains for a project (b) dry your hands first (c) poke things in a socket (d) climb an electric pole
3. 3.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a parallel circuit (c) a safe circuit (d) an open circuit
4. 4.💡 In a series circuit, how many paths does the current have? (a) one for each bulb (b) none (c) two (d) one
5. 5.Which of these gives us electricity? (a) an air conditioner (b) a power station (c) a refrigerator (d) a television
6. 6.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
7. 7.Which of these is safe? (a) stop if a part gets hot (b) use mains for a project (c) climb an electric pole (d) touch a fallen wire
8. 8.Which of these means the circuit is closed? (a) a wire is cut (b) all wires are joined (c) a wire has come loose (d) a cell is taken out
9. 9.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
10. 10.✏️ In a circuit diagram, wires are usually drawn as … (a) little stars (b) dotted circles (c) wavy lines (d) straight lines
11. 11.🔁 What must there be for a current to flow? (a) a complete loop (b) a broken path (c) a plastic gap (d) one loose end
12. 12.⚡ What does a traffic signal mainly change electricity into? (a) movement (b) light (c) sound (d) heat
13. 13.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
14. 14.💡 3 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 3 is taken out of its holder. How many bulbs glow?
15. 15.What does a reed switch do? (a) closes near a magnet (b) works only while pressed (c) springs back when let go (d) flips up or down
16. 16.Which of these means the circuit is closed? (a) a wire has come loose (b) a cell is taken out (c) the switch is ON (d) a wire is cut
17. 17.💡 A battery lights 4 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
18. 18.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
19. 19.Which of these is true of a series circuit? (a) each gets the full volts (b) used in house wiring (c) many paths for current (d) a single current path
20. 20.Which drawing is the symbol for a wire? (a) two equal parallel lines (b) a straight line (c) two or more cell symbols (d) a circle with an X in it
21. 21.⚠️ Is it safe to take cells out after use? (a) not safe (b) safe
22. 22.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) a single current path (c) a break stops every bulb (d) own switch for each bulb
23. 23.Which drawing is the symbol for a switch? (a) a circle with V inside (b) a line lifted at a gap (c) a dot where wires meet (d) a straight line
24. 24.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a fuse or MCB (c) a bulb (d) a plug top
25. 25.🔘 Which kind of switch works only while pressed? (a) a reed switch (b) a toggle switch (c) a slide switch (d) a push button
26. 26.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) one single wire (d) a switch with a lid
27. 27.🔌 Is a copper wire a conductor or an insulator? (a) a conductor (b) an insulator
28. 28.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a cell (c) a conductor (d) a switch that is ON
29. 29.Which of these is a conductor? (a) a glass marble (b) a copper wire (c) a wooden stick (d) a cotton thread
30. 30.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
31. 31.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a wooden stick across the gap. Does the bulb glow? (a) Yes (b) No
32. 32.⚡ What does a rice cooker mainly change electricity into? (a) light (b) movement (c) sound (d) heat
33. 33.🔍 Which is the odd one out? (a) poke things in a socket (b) touch a fallen wire (c) use a cable with cuts (d) fly kites in open fields
34. 34.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) in series (d) by Wi-Fi
35. 35.True or false: one tall, one short bar is the symbol for a bulb. (a) False (b) True
36. 36.💡 Why is house wiring done in parallel? (a) to make bulbs dim (b) to save copper only (c) each gets full voltage (d) so all go off together
37. 37.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
38. 38.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
39. 39.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) motor (c) cell (d) diode
40. 40.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line

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