Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 396 · 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.💡 3 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?
2. 2.🔍 Which is the odd one out? (a) an electric toy car (b) an electric drill (c) an exhaust fan (d) a buzzer
3. 3.⚠️ Is it safe to use small battery cells? (a) not safe (b) safe
4. 4.⚡ Which tiny particles drift along a metal wire to carry the current? (a) water drops (b) photons (c) electrons (d) dust particles
5. 5.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
6. 6.⚡ What do we call a flow of electric charge through a wire? (a) sound (b) friction (c) electric current (d) a magnet
7. 7.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) resistor (b) cell (c) bulb (d) motor
8. 8.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
9. 9.✏️ In a circuit diagram, which part is drawn as two equal parallel lines? (a) ammeter (b) voltmeter (c) resistor (d) capacitor
10. 10.True or false: if a cell is taken out, the circuit is open and no current flows. (a) True (b) False
11. 11.🔗 Series or parallel circuit: “used in house wiring”? (a) series (b) parallel
12. 12.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 230 V (d) 1.5 V
13. 13.⚠️ Who should be with you when you build a circuit? (a) a trusted adult (b) a younger child (c) a stranger online (d) nobody
14. 14.⚠️ Is it safe to fly a kite near wires? (a) safe (b) not safe
15. 15.🔘 A cell, a bulb and switches A and B are joined one after another in a single loop (series). A is ON and B is OFF. Does the bulb glow? (a) No (b) Yes
16. 16.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
17. 17.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.💡 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
19. 19.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to hide the circuit (d) to make it colourful
20. 20.🔌 Which metal is used for most electric wires at home? (a) plastic (b) copper (c) rubber (d) glass
21. 21.💡 6 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?
22. 22.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
23. 23.Which of these is true of a parallel circuit? (a) used in house wiring (b) a single current path (c) one bulb out, all go out (d) bulbs share the voltage
24. 24.True or false: “used in house wiring” is true of a parallel circuit. (a) False (b) True
25. 25.🔁 Is the circuit closed or open if the switch is OFF? (a) open (b) closed
26. 26.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the base (b) the filament (c) the glass (d) the switch
27. 27.🔍 Which is the odd one out? (a) an exhaust fan (b) a ceiling fan (c) a torch (d) an electric drill
28. 28.🔌 A gap of dry air between two wires acts as … (a) an insulator (b) a cell (c) a switch that is ON (d) a conductor
29. 29.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) resistor (b) motor (c) bulb (d) wire
30. 30.🔦 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
31. 31.Which of these is safe? (a) fly a kite near wires (b) use small battery cells (c) touch a switch when wet (d) throw cells in a fire
32. 32.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 4 glow? (a) Yes (b) No
33. 33.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) a smaller voltage (d) the same voltage
34. 34.Which of these is true of a parallel circuit? (a) bulbs share the voltage (b) many paths for current (c) a break stops every bulb (d) a single current path
35. 35.🔗 Series or parallel circuit: “many paths for current”? (a) parallel (b) series
36. 36.⚠️ About how many volts do home sockets in India supply? (a) 1.5 V (b) 9 V (c) 230 V (d) 12 V
37. 37.True or false: to throw cells in a fire is not safe. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) keep drinks far away (b) take cells out after use (c) touch a fallen wire (d) stay away from pylons
39. 39.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) never (c) only when both are OFF (d) when either is ON
40. 40.Which drawing is the symbol for a voltmeter? (a) a line lifted at a gap (b) a straight line (c) a circle with V inside (d) a long and a short line

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