Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 448 · 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.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
2. 2.✏️ In a circuit diagram, which part is drawn as a circle with an X in it? (a) bulb (b) diode (c) switch (d) battery
3. 3.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
4. 4.🔋 Does a cell give electricity or use electricity? (a) gives electricity (b) uses electricity
5. 5.Which of these is a conductor? (a) a rubber band (b) a steel coin (c) a woollen thread (d) a rubber eraser
6. 6.True or false: “a break stops every bulb” is true of a series circuit. (a) True (b) False
7. 7.✏️ In a circuit diagram, which part is drawn as a small empty box? (a) motor (b) capacitor (c) resistor (d) battery
8. 8.🔌 Is a metal paper clip a conductor or an insulator? (a) an insulator (b) a conductor
9. 9.Which of these is an insulator? (a) a steel spoon (b) an iron nail (c) a woollen thread (d) a brass key
10. 10.Which of these is safe? (a) climb an electric pole (b) stay away from pylons (c) fly a kite near wires (d) use a cable with cuts
11. 11.⚠️ About how many volts do home sockets in India supply? (a) 230 V (b) 1.5 V (c) 12 V (d) 9 V
12. 12.🔘 A cell and a bulb are joined to 2 side-by-side paths with one switch on each path — A and B (parallel). A is OFF and B is OFF. Does the bulb glow? (a) No (b) Yes
13. 13.🔦 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
14. 14.🔘 Switch A is on the main wire next to the cell and the bulb; then the wire splits into two side-by-side paths, one with switch B and one with switch C. A is OFF, B is ON and C is OFF. Does the bulb glow? (a) Yes (b) No
15. 15.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a series circuit (c) an open circuit (d) a full circuit
16. 16.True or false: a circle with A inside is the symbol for an ammeter. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a dry cork (b) a metal paper clip (c) a copper wire (d) a steel coin
18. 18.Which of these means the circuit is closed? (a) the switch is OFF (b) the bulb is unscrewed (c) all wires are joined (d) a wire has come loose
19. 19.🔍 Which is the odd one out? (a) fly kites in open fields (b) use small battery cells (c) dry your hands first (d) use a cable with cuts
20. 20.💡 3 identical bulbs are in parallel and each one takes 0.25 A. What total current (in amperes) comes from the battery? =
21. 21.🔁 In an old-style bulb, which thin wire glows when current flows? (a) the glass (b) the base (c) the filament (d) the switch
22. 22.Which of these mainly gives out heat? (a) an LED lamp (b) a room heater (c) a ceiling fan (d) a street light
23. 23.💡 A battery lights 5 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) brighter (c) dimmer
24. 24.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
25. 25.Which drawing is the symbol for a cell? (a) two or more cell symbols (b) a circle with V inside (c) a line lifted at a gap (d) one tall, one short bar
26. 26.Which drawing is the symbol for a switch? (a) many long-short pairs (b) a line lifted at a gap (c) a plain rectangle (d) two equal parallel lines
27. 27.🔋 2 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
28. 28.🔘 Which kind of switch closes near a magnet? (a) a reed switch (b) a push button (c) a tilt switch (d) a toggle switch
29. 29.True or false: a safety pin is a conductor. (a) True (b) False
30. 30.Which of these is safe? (a) climb an electric pole (b) poke things in a socket (c) use mains for a project (d) keep drinks far away
31. 31.🔍 Which is the odd one out? (a) a torch (b) an electric iron (c) a night lamp (d) a street light
32. 32.Which of these is an insulator? (a) a ceramic cup (b) a metal paper clip (c) a graphite rod (d) a safety pin
33. 33.⚡ What does a traffic signal mainly change electricity into? (a) light (b) sound (c) movement (d) heat
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by an iron nail. Does the bulb glow? (a) Yes (b) No
35. 35.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) neither line (d) the longer line
36. 36.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a copper wire across the gap. Does the bulb glow? (a) No (b) Yes
37. 37.🔘 A cell, a bulb and switches A, B, C and D are joined one after another in a single loop (series). A is ON, B is ON, C is OFF and D is OFF. Does the bulb glow? (a) No (b) Yes
38. 38.Which of these is safe? (a) throw cells in a fire (b) touch a fallen wire (c) dry your hands first (d) open a phone charger
39. 39.Which of these is safe? (a) use a cable with cuts (b) touch a switch when wet (c) open a phone charger (d) use small battery cells
40. 40.⚠️ Is it safe to take cells out after use? (a) safe (b) not safe

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