Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 12 · 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 is safe? (a) touch a switch when wet (b) touch a fallen wire (c) throw cells in a fire (d) use small battery cells
2. 2.⚡ What does a table fan mainly change electricity into? (a) movement (b) heat (c) sound (d) light
3. 3.🔦 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 rubber band. Does the bulb glow? (a) Yes (b) No
4. 4.True or false: “each gets the full volts” is true of a series circuit. (a) False (b) True
5. 5.True or false: a traffic signal mainly makes sound. (a) False (b) True
6. 6.⚠️ Is it safe to throw cells in a fire? (a) safe (b) not safe
7. 7.True or false: “a break stops every bulb” is true of a series circuit. (a) False (b) True
8. 8.⚡ Which tiny particles drift along a metal wire to carry the current? (a) electrons (b) photons (c) dust particles (d) water drops
9. 9.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) motor (b) LED (c) cell (d) voltmeter
10. 10.🔁 What must there be for a current to flow? (a) one loose end (b) a plastic gap (c) a broken path (d) a complete loop
11. 11.Which of these is true of a parallel circuit? (a) a break stops every bulb (b) own switch for each bulb (c) one bulb out, all go out (d) a single current path
12. 12.🔘 What does a switch do in a circuit? (a) changes the voltage (b) opens or closes the loop (c) stores current (d) makes electricity
13. 13.🔍 Which is the odd one out? (a) use mains for a project (b) open a phone charger (c) build with an adult near (d) fly a kite near wires
14. 14.Which of these is not safe? (a) fly kites in open fields (b) dry your hands first (c) touch a fallen wire (d) take cells out after use
15. 15.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
16. 16.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) pull them by the hand (b) shout for an adult (c) pour water on them (d) wait and watch
17. 17.Which of these is an insulator? (a) a copper wire (b) a plastic ruler (c) a safety pin (d) a metal paper clip
18. 18.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
19. 19.Which drawing is the symbol for a battery? (a) a circle with an X in it (b) many long-short pairs (c) a small empty box (d) a circle with M inside
20. 20.Which of these mainly makes sound? (a) a traffic signal (b) a loudspeaker (c) a room heater (d) an electric iron
21. 21.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a glass marble across the gap. Does the bulb glow? (a) No (b) Yes
22. 22.🔘 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
23. 23.🔁 Is the circuit closed or open if the bulb is unscrewed? (a) closed (b) open
24. 24.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a bulb (b) a plug top (c) a long wire (d) a fuse or MCB
25. 25.🔘 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
26. 26.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
27. 27.True or false: “many paths for current” is true of a parallel circuit. (a) True (b) False
28. 28.🔘 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 ON and C is OFF. Does the bulb glow? (a) No (b) Yes
29. 29.🔍 Which is the odd one out? (a) a copper wire (b) aluminium foil (c) a rubber band (d) a steel spoon
30. 30.🔍 Which is the odd one out? (a) a plastic ruler (b) a safety pin (c) a dry cork (d) a wooden stick
31. 31.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) by Wi-Fi (b) in parallel (c) not joined (d) in series
32. 32.🔦 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) No (b) Yes
33. 33.⚠️ Who should be with you when you build a circuit? (a) nobody (b) a trusted adult (c) a stranger online (d) a younger child
34. 34.🔁 Is the circuit closed or open if all wires are joined? (a) closed (b) open
35. 35.⚡ A bicycle dynamo changes which kind of energy into electricity? (a) light energy (b) chemical energy (c) movement energy (d) sound energy
36. 36.🔍 Which is the odd one out? (a) stop if a part gets hot (b) use mains for a project (c) use a cable with cuts (d) throw cells in a fire
37. 37.💡 2 identical bulbs are joined in series with an 8 V battery (ideal wires). How many volts does each bulb get? =
38. 38.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
39. 39.True or false: to throw cells in a fire is safe. (a) True (b) False
40. 40.Which of these is safe? (a) touch a fallen wire (b) use mains for a project (c) keep drinks far away (d) touch a switch when wet

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