Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 513 · 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 is the odd one out? (a) open a phone charger (b) poke things in a socket (c) use small battery cells (d) use mains for a project
2. 2.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
3. 3.🔋 How many 3 V cells must be joined in series to give 6 V?
4. 4.True or false: “each gets the full volts” is true of a parallel circuit. (a) True (b) False
5. 5.🔋 3 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)? =
6. 6.Which of these is a conductor? (a) a paper strip (b) a plastic straw (c) a wooden stick (d) a brass key
7. 7.True or false: a rubber band is a conductor. (a) False (b) True
8. 8.⚡ What does an electric drill mainly change electricity into? (a) sound (b) light (c) heat (d) movement
9. 9.🔌 Most metals are good … (a) insulators (b) conductors (c) batteries (d) magnets only
10. 10.🔋 Does a refrigerator give electricity or use electricity? (a) gives electricity (b) uses electricity
11. 11.🔋 Does a mobile phone give electricity or use electricity? (a) uses electricity (b) gives electricity
12. 12.💡 6 identical bulbs are in parallel and each bulb has its own switch on its path. 2 of the switches are OFF and the rest are ON. How many bulbs glow?
13. 13.True or false: “a single current path” is true of a series circuit. (a) False (b) True
14. 14.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a plug top (b) a fuse or MCB (c) a long wire (d) a bulb
15. 15.✏️ In a circuit diagram, which part is drawn as triangle against a bar? (a) ammeter (b) motor (c) diode (d) capacitor
16. 16.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) voltmeter (b) bulb (c) LED (d) junction
17. 17.What does a reed switch do? (a) slides side to side (b) works only while pressed (c) closes near a magnet (d) flips up or down
18. 18.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
19. 19.🔍 Which is the odd one out? (a) a doorbell (b) a school bell (c) a torch (d) a siren
20. 20.🔋 How many 3 V cells must be joined in series to give 12 V?
21. 21.True or false: a small empty box is the symbol for a resistor. (a) False (b) True
22. 22.True or false: if all wires are joined, the circuit is open and no current flows. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber band (c) a paper strip (d) an iron nail
24. 24.🔦 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
25. 25.🔁 Is the circuit closed or open if a cell is taken out? (a) closed (b) open
26. 26.🔌 Is a graphite rod a conductor or an insulator? (a) a conductor (b) an insulator
27. 27.💡 5 identical bulbs are joined in series with a 12.5 V battery (ideal wires). How many volts does each bulb get? =
28. 28.Which of these mainly gives out heat? (a) a water heater (b) a mixer grinder (c) a tube light (d) a traffic signal
29. 29.⚠️ Is it safe to use a cable with cuts? (a) not safe (b) safe
30. 30.⚠️ Is it safe to touch a switch when wet? (a) not safe (b) safe
31. 31.⚡ What does a torch mainly change electricity into? (a) movement (b) heat (c) sound (d) light
32. 32.🔦 A circuit has a used-up (dead) 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 metal paper clip. Does the bulb glow? (a) Yes (b) No
33. 33.💡 6 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
34. 34.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
35. 35.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they all go out (c) they explode (d) they keep glowing
36. 36.True or false: a dot where wires meet is the symbol for a bulb. (a) True (b) False
37. 37.Which drawing is the symbol for a battery? (a) triangle against a bar (b) two or more cell symbols (c) one tall, one short bar (d) a dot where wires meet
38. 38.Which of these mainly makes sound? (a) a torch (b) a mixer grinder (c) an electric iron (d) a doorbell
39. 39.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in parallel (c) by Wi-Fi (d) in series
40. 40.True or false: a plastic straw is an insulator. (a) False (b) True

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