Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 997 · 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.💡 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 1 is taken out of its holder. How many bulbs glow?
2. 2.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a younger child (c) a trusted adult (d) a stranger online
3. 3.True or false: a plastic straw is an insulator. (a) True (b) False
4. 4.True or false: to dry your hands first is safe. (a) False (b) True
5. 5.⚡ A solar panel changes which kind of energy into electricity? (a) wind energy (b) sound energy (c) light energy (d) chemical energy
6. 6.Which of these is true of a parallel circuit? (a) each gets the full volts (b) bulbs share the voltage (c) a break stops every bulb (d) one bulb out, all go out
7. 7.True or false: to touch a switch when wet is safe. (a) False (b) True
8. 8.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. A gap in one wire is bridged by a metal paper clip. Does the bulb glow? (a) No (b) Yes
9. 9.🔋 4 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)? =
10. 10.True or false: triangle against a bar is the symbol for a diode. (a) False (b) True
11. 11.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
12. 12.🔍 Which is the odd one out? (a) a brass key (b) a plastic straw (c) a woollen thread (d) a ceramic cup
13. 13.🔘 Which kind of switch springs back when let go? (a) a slide switch (b) a toggle switch (c) a tilt switch (d) a push button
14. 14.🔘 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
15. 15.Which of these is safe? (a) use a cable with cuts (b) dry your hands first (c) fly a kite near wires (d) poke things in a socket
16. 16.🔍 Which is the odd one out? (a) a traffic signal (b) an LED lamp (c) a tube light (d) an electric drill
17. 17.Which of these mainly gives out light? (a) an exhaust fan (b) a siren (c) a torch (d) a room heater
18. 18.Which drawing is the symbol for a capacitor? (a) a plain rectangle (b) triangle, bar and arrows (c) a long and a short line (d) two equal parallel lines
19. 19.True or false: “own switch for each bulb” is true of a parallel circuit. (a) True (b) False
20. 20.✏️ In a cell symbol, which line is the + terminal? (a) neither line (b) both lines (c) the longer line (d) the shorter line
21. 21.Which of these is not safe? (a) stay away from pylons (b) use a cable with cuts (c) dry your hands first (d) stop if a part gets hot
22. 22.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
23. 23.🔁 Is the circuit closed or open if a wire is cut? (a) closed (b) open
24. 24.Which of these means the circuit is closed? (a) a wire is cut (b) a cell is taken out (c) all wires are joined (d) a wire has come loose
25. 25.🔘 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 ON. Does the bulb glow? (a) No (b) Yes
26. 26.💡 3 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. Does bulb 3 glow? (a) No (b) Yes
27. 27.✏️ In a circuit diagram, which part is drawn as a circle with A inside? (a) motor (b) ammeter (c) battery (d) junction
28. 28.⚡ What does an electric iron mainly change electricity into? (a) light (b) heat (c) sound (d) movement
29. 29.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) a circle with V inside (c) a plain rectangle (d) one tall, one short bar
30. 30.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) not joined (c) in parallel (d) in series
31. 31.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
32. 32.True or false: two or more cell symbols is the symbol for a battery. (a) True (b) False
33. 33.🔘 Which kind of switch flips up or down? (a) a push button (b) a tilt switch (c) a toggle switch (d) a slide switch
34. 34.Which of these is an insulator? (a) a dry cork (b) a safety pin (c) a graphite rod (d) a steel coin
35. 35.🔗 Series or parallel circuit: “one bulb out, all go out”? (a) parallel (b) series
36. 36.🔍 Which is the odd one out? (a) a ceiling fan (b) a doorbell (c) a table fan (d) a mixer grinder
37. 37.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to make it colourful (c) quick and clear for all (d) to hide the circuit
38. 38.💡 4 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
39. 39.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
40. 40.🔘 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 OFF and C is OFF. Does the bulb glow? (a) No (b) Yes

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