Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 382 · 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 is a conductor? (a) a glass marble (b) a cotton thread (c) a metal paper clip (d) a wooden stick
2. 2.🔋 How many 2 V cells must be joined in series to give 6 V?
3. 3.⚠️ Is it safe to use a cable with cuts? (a) safe (b) not safe
4. 4.💡 Why is house wiring done in parallel? (a) to save copper only (b) each gets full voltage (c) so all go off together (d) to make bulbs dim
5. 5.✏️ In a cell symbol, which line is the + terminal? (a) the shorter line (b) both lines (c) the longer line (d) neither line
6. 6.True or false: “many paths for current” is true of a parallel circuit. (a) False (b) True
7. 7.Which of these means the circuit is open? (a) the loop is complete (b) all wires are joined (c) the switch is ON (d) a wire has come loose
8. 8.🔋 Does a computer give electricity or use electricity? (a) gives electricity (b) uses electricity
9. 9.Which of these gives us electricity? (a) a refrigerator (b) a battery (c) a television (d) a computer
10. 10.Which of these mainly gives out heat? (a) a mixer grinder (b) a buzzer (c) a water heater (d) a street light
11. 11.Which of these mainly makes sound? (a) a mixer grinder (b) a street light (c) a school bell (d) a night lamp
12. 12.True or false: if the switch is OFF, the circuit is closed and current flows. (a) True (b) False
13. 13.💡 4 identical bulbs are joined in series with a 16 V battery (ideal wires). How many volts does each bulb get? =
14. 14.🔍 Which is the odd one out? (a) a table fan (b) an electric toy car (c) a rice cooker (d) an exhaust fan
15. 15.🔦 A circuit has a new cell, a good bulb and a switch that is OFF. All the wires are firmly joined. A gap in one wire is bridged by a dry cork. Does the bulb glow? (a) Yes (b) No
16. 16.Which of these means the circuit is closed? (a) the bulb is unscrewed (b) all wires are joined (c) a wire is cut (d) a wire has come loose
17. 17.💡 A battery lights 3 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) the same (b) dimmer (c) brighter
18. 18.True or false: a rubber eraser is an insulator. (a) True (b) False
19. 19.⚠️ Is it safe to keep drinks far away? (a) safe (b) not safe
20. 20.True or false: a reed switch closes near a magnet. (a) False (b) True
21. 21.Which drawing is the symbol for a resistor? (a) triangle against a bar (b) a small empty box (c) a straight line (d) a circle with a cross
22. 22.🔁 Is the circuit closed or open if the switch is ON? (a) open (b) closed
23. 23.🔋 8 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)? =
24. 24.🔍 Which is the odd one out? (a) open a phone charger (b) stop if a part gets hot (c) use small battery cells (d) take cells out after use
25. 25.🔘 Two switches are in parallel (side by side). When does the bulb glow? (a) only when both are ON (b) when either is ON (c) only when both are OFF (d) never
26. 26.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) an open circuit (c) a safe circuit (d) a short circuit
27. 27.🔘 What does a switch do in a circuit? (a) stores current (b) makes electricity (c) changes the voltage (d) opens or closes the loop
28. 28.True or false: to stay away from pylons is safe. (a) True (b) False
29. 29.⚠️ Is it safe to climb an electric pole? (a) not safe (b) safe
30. 30.🔌 Is a steel coin a conductor or an insulator? (a) a conductor (b) an insulator
31. 31.True or false: a brass key is an insulator. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) build with an adult near (b) fly kites in open fields (c) climb an electric pole (d) keep drinks far away
33. 33.⚠️ Is it safe to throw cells in a fire? (a) not safe (b) safe
34. 34.⚡ A cell changes stored chemical energy into which kind of energy? (a) wind energy (b) sound energy (c) electrical energy (d) nuclear energy
35. 35.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) it does not matter (c) none (d) both of them
36. 36.🔌 Which part of a screwdriver should an electrician hold? (a) the steel shaft (b) the plastic handle (c) the metal tip (d) the bare end
37. 37.True or false: if a wire has come loose, the circuit is closed and current flows. (a) False (b) True
38. 38.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a bigger voltage (c) a smaller voltage (d) no voltage
39. 39.⚡ What does an electric kettle mainly change electricity into? (a) sound (b) heat (c) light (d) movement
40. 40.True or false: “a single current path” is true of a parallel circuit. (a) True (b) False

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