Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 200 · 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 mainly makes sound? (a) a table fan (b) a mixer grinder (c) an electric iron (d) a siren
2. 2.🔌 Which part of a screwdriver should an electrician hold? (a) the plastic handle (b) the steel shaft (c) the metal tip (d) the bare end
3. 3.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) ammeter (b) wire (c) cell (d) resistor
4. 4.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
5. 5.Which of these is a conductor? (a) a plastic ruler (b) aluminium foil (c) a paper strip (d) a ceramic cup
6. 6.💡 2 identical bulbs are in parallel and each one takes 0.1 A. What total current (in amperes) comes from the battery? =
7. 7.💡 A battery lights 5 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) brighter (b) dimmer (c) the same
8. 8.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
9. 9.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
10. 10.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) when either is ON (b) only when both are ON (c) never (d) only when both are OFF
11. 11.✏️ In a circuit diagram, which part is drawn as a line lifted at a gap? (a) junction (b) motor (c) switch (d) ammeter
12. 12.True or false: a school bell mainly makes sound. (a) False (b) True
13. 13.True or false: a ceramic cup is an insulator. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) poke things in a socket (b) dry your hands first (c) build with an adult near (d) take cells out after use
15. 15.True or false: a traffic signal mainly makes sound. (a) True (b) False
16. 16.⚡ A cell changes stored chemical energy into which kind of energy? (a) electrical energy (b) wind energy (c) sound energy (d) nuclear energy
17. 17.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
18. 18.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
19. 19.🔦 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
20. 20.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
21. 21.💡 4 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 4 is taken out of its holder. How many bulbs glow?
22. 22.True or false: a safety pin is a conductor. (a) False (b) True
23. 23.💡 5 identical bulbs are joined in series with a 7.5 V battery (ideal wires). How many volts does each bulb get? =
24. 24.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
25. 25.⚡ What does a torch mainly change electricity into? (a) sound (b) heat (c) movement (d) light
26. 26.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a cotton thread across the gap. Does the bulb glow? (a) Yes (b) No
27. 27.Which of these is safe? (a) keep drinks far away (b) use a cable with cuts (c) open a phone charger (d) use mains for a project
28. 28.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a short circuit (b) a safe circuit (c) a parallel circuit (d) an open circuit
29. 29.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) an open circuit (c) a series circuit (d) a full circuit
30. 30.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
31. 31.✏️ In a cell symbol, which line is the + terminal? (a) both lines (b) neither line (c) the shorter line (d) the longer line
32. 32.🔋 4 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)? =
33. 33.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) wire (b) cell (c) resistor (d) bulb
34. 34.Which of these is an insulator? (a) a brass key (b) a metal paper clip (c) a steel coin (d) a rubber band
35. 35.💡 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
36. 36.💡 4 identical bulbs are joined in series with a 12 V battery (ideal wires). How many volts does each bulb get? =
37. 37.🔍 Which is the odd one out? (a) a plastic straw (b) a steel spoon (c) a graphite rod (d) a metal paper clip
38. 38.💡 2 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
39. 39.🔦 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 plastic ruler. Does the bulb glow? (a) Yes (b) No
40. 40.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) to hide the circuit (c) to make it colourful (d) quick and clear for all

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