Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 966 · 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 bulb has two contacts. How many must be joined into the loop for it to glow? (a) it does not matter (b) both of them (c) none (d) only one
2. 2.🔦 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 paper strip. Does the bulb glow? (a) No (b) Yes
3. 3.⚠️ About how many volts do home sockets in India supply? (a) 12 V (b) 230 V (c) 9 V (d) 1.5 V
4. 4.🔁 What do we call a circuit with a break in it? (a) a closed circuit (b) a full circuit (c) a series circuit (d) an open circuit
5. 5.💡 6 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 6 is taken out of its holder. How many bulbs glow?
6. 6.🔌 A gap of dry air between two wires acts as … (a) a switch that is ON (b) a cell (c) a conductor (d) an insulator
7. 7.🔌 Is a graphite rod a conductor or an insulator? (a) an insulator (b) a conductor
8. 8.💡 2 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. How many bulbs glow?
9. 9.What does a tilt switch do? (a) stays where you flip it (b) closes when tipped over (c) slides side to side (d) flips up or down
10. 10.💡 4 identical bulbs are joined in series with a 6 V battery (ideal wires). How many volts does each bulb get? =
11. 11.Which of these mainly gives out light? (a) a ceiling fan (b) an electric drill (c) a water heater (d) an LED lamp
12. 12.✏️ Why do engineers draw circuits with symbols? (a) symbols are heavier (b) quick and clear for all (c) to make it colourful (d) to hide the circuit
13. 13.🔦 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 aluminium foil. Does the bulb glow? (a) Yes (b) No
14. 14.Which of these mainly gives out heat? (a) a doorbell (b) an electric iron (c) an exhaust fan (d) a street light
15. 15.Which of these mainly gives out light? (a) an electric toy car (b) a night lamp (c) a siren (d) a rice cooker
16. 16.True or false: to take cells out after use is safe. (a) True (b) False
17. 17.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
18. 18.🔋 2 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they get dimmer (b) they keep glowing (c) they all go out (d) they explode
20. 20.🔋 Does a television give electricity or use electricity? (a) uses electricity (b) gives electricity
21. 21.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
22. 22.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
23. 23.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a graphite rod across the gap. Does the bulb glow? (a) No (b) Yes
24. 24.Which drawing is the symbol for a cell? (a) two or more cell symbols (b) many long-short pairs (c) one tall, one short bar (d) a small empty box
25. 25.True or false: a plastic straw is a conductor. (a) False (b) True
26. 26.Which of these means the circuit is open? (a) the loop is complete (b) the bulb is unscrewed (c) the switch is ON (d) all wires are joined
27. 27.True or false: “own switch for each bulb” is true of a series circuit. (a) False (b) True
28. 28.💡 2 identical bulbs are in parallel and each one takes 0.5 A. What total current (in amperes) comes from the battery? =
29. 29.💡 Old festival light strings went fully dark when one bulb failed. How were they joined? (a) not joined (b) in series (c) by Wi-Fi (d) in parallel
30. 30.Which of these is safe? (a) poke things in a socket (b) keep drinks far away (c) open a phone charger (d) throw cells in a fire
31. 31.Which of these is safe? (a) dry your hands first (b) poke things in a socket (c) use mains for a project (d) touch a switch when wet
32. 32.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a brass key across the gap. Does the bulb glow? (a) Yes (b) No
33. 33.⚡ A cell changes stored chemical energy into which kind of energy? (a) nuclear energy (b) wind energy (c) electrical energy (d) sound energy
34. 34.🔍 Which is the odd one out? (a) a mixer grinder (b) a table fan (c) an electric iron (d) a ceiling fan
35. 35.🔌 Why are electric wires covered in plastic? (a) plastic makes current (b) plastic is a conductor (c) to make them heavy (d) plastic is an insulator
36. 36.Which of these is not safe? (a) fly a kite near wires (b) dry your hands first (c) stay away from pylons (d) stop if a part gets hot
37. 37.Which drawing is the symbol for a bulb? (a) many long-short pairs (b) a circle with a cross (c) one tall, one short bar (d) triangle, bar and arrows
38. 38.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a plastic straw across the gap. Does the bulb glow? (a) No (b) Yes
39. 39.🔘 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 OFF and C is ON. Does the bulb glow? (a) No (b) Yes
40. 40.🔘 A bulb and a cell are joined through 6 switches one after another in a single loop (series). What is the smallest number of switches that must be ON to light the bulb?

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids