Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 116 · 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 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 OFF. Does the bulb glow? (a) No (b) Yes
2. 2.🔋 7 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
3. 3.🔘 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 ON and C is OFF. Does the bulb glow? (a) Yes (b) No
4. 4.⚠️ Why must we never touch switches with wet hands? (a) it is just untidy (b) it spoils the paint (c) water makes it cold (d) water carries current
5. 5.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the filament (b) the switch (c) the base (d) the glass
6. 6.True or false: “one bulb out, all go out” is true of a series circuit. (a) False (b) True
7. 7.What does a toggle switch do? (a) closes when tipped over (b) works only while pressed (c) stays where you flip it (d) closes near a magnet
8. 8.✏️ In a circuit diagram, which part is drawn as a straight line? (a) resistor (b) wire (c) battery (d) motor
9. 9.🔘 Which kind of switch slides side to side? (a) a slide switch (b) a push button (c) a toggle switch (d) a tilt switch
10. 10.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
11. 11.True or false: a tilt switch closes near a magnet. (a) True (b) False
12. 12.🔘 Which kind of switch flips up or down? (a) a push button (b) a slide switch (c) a toggle switch (d) a reed switch
13. 13.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) none (c) both of them (d) only one
14. 14.True or false: “each gets the full volts” is true of a parallel 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) in parallel (c) not joined (d) by Wi-Fi
16. 16.Which of these is safe? (a) touch a fallen wire (b) dry your hands first (c) use mains for a project (d) throw cells in a fire
17. 17.Which drawing is the symbol for a capacitor? (a) a small empty box (b) a circle with a cross (c) two equal parallel lines (d) a long and a short line
18. 18.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) bulb (b) capacitor (c) ammeter (d) battery
19. 19.⚠️ Which power source should children use for electronics projects? (a) a wall socket (b) an inverter socket (c) a small battery pack (d) a mains extension board
20. 20.Which of these is safe? (a) open a phone charger (b) poke things in a socket (c) fly a kite near wires (d) keep drinks far away
21. 21.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
22. 22.True or false: a cotton thread is a conductor. (a) False (b) True
23. 23.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
24. 24.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
25. 25.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) one bulb out, all go out (c) a break stops every bulb (d) each gets the full volts
26. 26.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a ceramic cup. Does the bulb glow? (a) Yes (b) No
27. 27.True or false: a loudspeaker mainly makes sound. (a) False (b) True
28. 28.💡 2 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 2 is taken out of its holder. How many bulbs glow?
29. 29.Which of these mainly gives out heat? (a) a ceiling fan (b) a traffic signal (c) an electric kettle (d) a doorbell
30. 30.⚠️ Is it safe to fly kites in open fields? (a) safe (b) not safe
31. 31.🔍 Which is the odd one out? (a) stay away from pylons (b) use a cable with cuts (c) take cells out after use (d) dry your hands first
32. 32.True or false: triangle against a bar is the symbol for a motor. (a) True (b) False
33. 33.True or false: one tall, one short bar is the symbol for a resistor. (a) False (b) True
34. 34.Which of these mainly gives out heat? (a) an electric iron (b) a doorbell (c) a night lamp (d) an electric drill
35. 35.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) the same voltage (c) no voltage (d) half the voltage
36. 36.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they keep glowing (d) they get dimmer
37. 37.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
38. 38.🔦 A circuit has a used-up (dead) cell, a good bulb and a switch that is ON. All the wires are firmly joined. Does the bulb glow? (a) No (b) Yes
39. 39.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a circle with M inside (c) a plain rectangle (d) a dot where wires meet
40. 40.Which of these mainly makes movement? (a) a siren (b) a rice cooker (c) a table fan (d) an LED lamp

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