Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 390 · 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.⚠️ Someone is getting a shock and is still touching a wire. What should you do? (a) shout for an adult (b) pull them by the hand (c) wait and watch (d) pour water on them
2. 2.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel spoon across the gap. Does the bulb glow? (a) No (b) Yes
3. 3.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 12 V (c) 9 V (d) 230 V
4. 4.🔘 A bulb and a cell are joined through 2 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?
5. 5.⚠️ Is it safe to dry your hands first? (a) not safe (b) safe
6. 6.Which of these is a conductor? (a) a plastic straw (b) a woollen thread (c) a safety pin (d) a plastic ruler
7. 7.True or false: a copper wire is a conductor. (a) False (b) True
8. 8.True or false: a toggle switch stays where you flip it. (a) True (b) False
9. 9.💡 4 identical bulbs are joined in parallel across a 3 V battery (ideal wires). How many volts does each bulb get? =
10. 10.💡 4 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 3 is taken out of its holder. Does bulb 1 glow? (a) Yes (b) No
11. 11.Which drawing is the symbol for a bulb? (a) a circle with an X in it (b) triangle, bar and arrows (c) a straight line (d) a long and a short line
12. 12.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
13. 13.✏️ In a circuit diagram, which part is drawn as one tall, one short bar? (a) capacitor (b) switch (c) cell (d) resistor
14. 14.🔘 When a switch is ON, the circuit is … (a) broken (b) open (c) cut (d) closed
15. 15.⚠️ 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) an open circuit (d) a parallel circuit
16. 16.True or false: “one bulb out, all go out” is true of a parallel circuit. (a) False (b) True
17. 17.Which of these is a conductor? (a) a cotton thread (b) a rubber eraser (c) a paper strip (d) a brass key
18. 18.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) parallel (b) series
19. 19.🔍 Which is the odd one out? (a) a ceramic cup (b) a plastic straw (c) aluminium foil (d) a paper strip
20. 20.True or false: a push button closes near a magnet. (a) False (b) True
21. 21.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
22. 22.⚡ Which tiny particles drift along a metal wire to carry the current? (a) dust particles (b) photons (c) water drops (d) electrons
23. 23.🔍 Which is the odd one out? (a) a copper wire (b) an iron nail (c) a rubber band (d) a graphite rod
24. 24.Which of these is an insulator? (a) aluminium foil (b) a cotton thread (c) a steel coin (d) a graphite rod
25. 25.Which of these is a conductor? (a) a paper strip (b) a rubber eraser (c) a dry cork (d) aluminium foil
26. 26.🔘 Which kind of switch stays where you flip it? (a) a toggle switch (b) a slide switch (c) a push button (d) a tilt switch
27. 27.🔍 Which is the odd one out? (a) a traffic signal (b) a street light (c) a water heater (d) a tube light
28. 28.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
29. 29.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
30. 30.💡 5 identical bulbs are joined in parallel across a 9 V battery (ideal wires). How many volts does each bulb get? =
31. 31.Which of these means the circuit is closed? (a) a wire has come loose (b) the switch is ON (c) a wire is cut (d) the switch is OFF
32. 32.🔋 What should you do with used-up cells? (a) give them for recycling (b) throw them in a fire (c) cut them open (d) bury them in soil
33. 33.What does a slide switch do? (a) works only while pressed (b) slides side to side (c) closes when tipped over (d) stays where you flip it
34. 34.Which of these uses electricity? (a) a battery (b) a cell (c) a bicycle dynamo (d) a mobile phone
35. 35.🔍 Which is the odd one out? (a) an electric iron (b) an electric kettle (c) a water heater (d) a torch
36. 36.Which of these is a conductor? (a) a woollen thread (b) a steel spoon (c) a dry cork (d) a wooden stick
37. 37.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
38. 38.True or false: “bulbs share the voltage” is true of a series circuit. (a) True (b) False
39. 39.✏️ In a circuit diagram, which part is drawn as a circle with M inside? (a) bulb (b) diode (c) ammeter (d) motor
40. 40.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =

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