Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 602 · 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.True or false: if all wires are joined, the circuit is closed and current flows. (a) False (b) True
2. 2.💡 5 identical bulbs are joined in series with a 10 V battery (ideal wires). How many volts does each bulb get? =
3. 3.Which drawing is the symbol for a capacitor? (a) two equal parallel lines (b) a small empty box (c) triangle against a bar (d) many long-short pairs
4. 4.True or false: to fly kites in open fields is safe. (a) False (b) True
5. 5.Which of these means the circuit is open? (a) the loop is complete (b) the switch is ON (c) all wires are joined (d) a cell is taken out
6. 6.🔌 Is a plastic straw a conductor or an insulator? (a) a conductor (b) an insulator
7. 7.🔦 A circuit has a new cell, a bulb with a broken filament and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a glass marble. Does the bulb glow? (a) Yes (b) No
8. 8.True or false: if a wire has come loose, the circuit is open and no current flows. (a) True (b) False
9. 9.True or false: a ceramic cup is a conductor. (a) False (b) True
10. 10.⚠️ What protects home wiring by melting or tripping when too much current flows? (a) a long wire (b) a plug top (c) a bulb (d) a fuse or MCB
11. 11.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in parallel (b) not joined (c) by Wi-Fi (d) in series
12. 12.Which drawing is the symbol for a diode? (a) a circle with an X in it (b) two or more cell symbols (c) one tall, one short bar (d) triangle against a bar
13. 13.🔘 Two switches are in series. When does the bulb glow? (a) when either is ON (b) when both are OFF (c) never (d) when both are ON
14. 14.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
15. 15.🔍 Which is the odd one out? (a) a ceiling fan (b) a night lamp (c) an LED lamp (d) a torch
16. 16.🔋 Does a cell give electricity or use electricity? (a) uses electricity (b) gives electricity
17. 17.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
19. 19.🔌 Which part of a screwdriver should an electrician hold? (a) the metal tip (b) the plastic handle (c) the steel shaft (d) the bare end
20. 20.🔘 A cell, a bulb and switches A, B and C are joined one after another in a single loop (series). A is ON, B is OFF and C is ON. Does the bulb glow? (a) No (b) Yes
21. 21.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
22. 22.Which drawing is the symbol for a wire? (a) a straight line (b) a small empty box (c) a long and a short line (d) a circle with V inside
23. 23.True or false: “a break stops every bulb” is true of a parallel circuit. (a) False (b) True
24. 24.True or false: to keep drinks far away is not safe. (a) True (b) False
25. 25.🔦 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 safety pin. Does the bulb glow? (a) No (b) Yes
26. 26.What does a slide switch do? (a) stays where you flip it (b) flips up or down (c) slides side to side (d) springs back when let go
27. 27.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
28. 28.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
29. 29.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
30. 30.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is OFF and B is ON. Does the bulb glow? (a) No (b) Yes
31. 31.True or false: an iron nail is an insulator. (a) True (b) False
32. 32.🔘 When a switch is ON, the circuit is … (a) cut (b) open (c) broken (d) closed
33. 33.True or false: a toggle switch closes when tipped over. (a) True (b) False
34. 34.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
35. 35.Which drawing is the symbol for a voltmeter? (a) a circle with V inside (b) a straight line (c) a circle with an X in it (d) a circle with a cross
36. 36.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. All the bulbs are in place. How many bulbs glow?
37. 37.⚡ What does a ceiling fan mainly change electricity into? (a) light (b) movement (c) sound (d) heat
38. 38.💡 In a series circuit, how many paths does the current have? (a) one (b) none (c) two (d) one for each bulb
39. 39.🔘 A bulb and a cell are joined through 4 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
40. 40.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)

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