Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 690 · 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.True or false: if a cell is taken out, the circuit is closed and current flows. (a) True (b) False
2. 2.Which drawing is the symbol for a junction? (a) a dot where wires meet (b) many long-short pairs (c) a circle with a cross (d) a straight line
3. 3.True or false: a mixer grinder mainly gives out light. (a) False (b) True
4. 4.🔋 Does a solar panel give electricity or use electricity? (a) gives electricity (b) uses electricity
5. 5.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
6. 6.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) both of them (b) only one (c) none (d) it does not matter
7. 7.💡 3 identical bulbs are joined in series with a 3 V battery (ideal wires). How many volts does each bulb get? =
8. 8.🔌 Is a steel spoon a conductor or an insulator? (a) a conductor (b) an insulator
9. 9.⚠️ A cell gets hot when its + and − ends are joined by a bare wire. What is this called? (a) a parallel circuit (b) a safe circuit (c) an open circuit (d) a short circuit
10. 10.💡 5 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 5 is taken out of its holder. How many bulbs glow?
11. 11.⚠️ About how many volts do home sockets in India supply? (a) 9 V (b) 1.5 V (c) 12 V (d) 230 V
12. 12.🔁 What must there be for a current to flow? (a) a plastic gap (b) one loose end (c) a broken path (d) a complete loop
13. 13.⚠️ Is it safe to touch a switch when wet? (a) safe (b) not safe
14. 14.🔍 Which is the odd one out? (a) a plastic ruler (b) a safety pin (c) a woollen thread (d) a glass marble
15. 15.✏️ Why do engineers draw circuits with symbols? (a) to make it colourful (b) quick and clear for all (c) to hide the circuit (d) symbols are heavier
16. 16.Which of these is true of a parallel circuit? (a) each gets the full volts (b) one bulb out, all go out (c) bulbs share the voltage (d) a single current path
17. 17.🔦 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 dry cork. Does the bulb glow? (a) Yes (b) No
18. 18.What does a push button do? (a) slides side to side (b) closes near a magnet (c) springs back when let go (d) flips up or down
19. 19.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) bury them in soil (d) cut them open
20. 20.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
21. 21.Which of these is true of a series circuit? (a) many paths for current (b) each gets the full volts (c) own switch for each bulb (d) one bulb out, all go out
22. 22.🔍 Which is the odd one out? (a) open a phone charger (b) use mains for a project (c) use a cable with cuts (d) stay away from pylons
23. 23.Which drawing is the symbol for a capacitor? (a) two equal parallel lines (b) a circle with A inside (c) a long and a short line (d) a circle with a cross
24. 24.Which of these means the circuit is open? (a) the switch is ON (b) the switch is OFF (c) all wires are joined (d) the loop is complete
25. 25.Which drawing is the symbol for a voltmeter? (a) a small empty box (b) a circle with an X in it (c) a plain rectangle (d) a circle with V inside
26. 26.🔍 Which is the odd one out? (a) a dry cork (b) an iron nail (c) a rubber eraser (d) a ceramic cup
27. 27.✏️ In a circuit diagram, which part is drawn as a circle with V inside? (a) bulb (b) battery (c) voltmeter (d) resistor
28. 28.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
29. 29.True or false: two or more cell symbols is the symbol for a battery. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) an electric kettle (b) a rice cooker (c) an electric drill (d) a water heater
31. 31.💡 2 identical bulbs are joined in parallel across a 12 V battery (ideal wires). How many volts does each bulb get? =
32. 32.What does a reed switch do? (a) springs back when let go (b) slides side to side (c) stays where you flip it (d) closes near a magnet
33. 33.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) in series (b) not joined (c) by Wi-Fi (d) in parallel
34. 34.💡 4 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 3 glow? (a) No (b) Yes
35. 35.🔌 Is a rubber band a conductor or an insulator? (a) a conductor (b) an insulator
36. 36.🔍 Which is the odd one out? (a) a traffic signal (b) a street light (c) an exhaust fan (d) a torch
37. 37.🔍 Which is the odd one out? (a) throw cells in a fire (b) build with an adult near (c) take cells out after use (d) stay away from pylons
38. 38.True or false: if the bulb is unscrewed, the circuit is closed and current flows. (a) True (b) False
39. 39.True or false: triangle against a bar is the symbol for a capacitor. (a) False (b) True
40. 40.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same

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