Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 819 · 40 questions

Remember (Push, flow, resist): Voltage → volts (V), current → amperes (A), resistance → ohms (Ω), power → watts (W). milli (m) = ÷ 1000 and kilo (k) = × 1000: 250 mA = 0.25 A, 2.2 kΩ = 2200 Ω. Voltmeter across a part; ammeter in series.

1. 1.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) the water pressure (c) a narrow pipe (d) the flow of water
2. 2.Which of these is measured in watts (W)? (a) current (b) resistance (c) energy used each second (d) voltage
3. 3.Which of these is measured in ohms (Ω)? (a) how much a part resists (b) power (c) the flow of charge (d) current
4. 4.True or false: the ammeter measures current. (a) False (b) True
5. 5.📏 How many milliamperes (mA) is 2.52 A?
6. 6.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
7. 7.Which of these is measured in watts (W)? (a) power (b) how much a part resists (c) voltage (d) the push of a cell
8. 8.True or false: power is measured in watts (W). (a) False (b) True
9. 9.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 10 (c) 1000 (d) 60
10. 10.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 100 (b) 1024 (c) 1000 (d) 10
11. 11.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
12. 12.📏 How many milliamperes (mA) is 2.56 A?
13. 13.True or false: the flow of charge is measured in ohms (Ω). (a) False (b) True
14. 14.📏 How many kilo-ohms (kΩ) is 200 Ω? =
15. 15.📏 How many milliamperes (mA) is 1.47 A?
16. 16.📏 How many watts (W) is 3.1 kW?
17. 17.📏 How many milliamperes (mA) is 1.72 A?
18. 18.📏 Which unit measures the push of a cell? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
19. 19.📏 Which unit measures the flow of charge? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
20. 20.True or false: the voltmeter measures voltage. (a) False (b) True
21. 21.True or false: the voltmeter measures current. (a) False (b) True
22. 22.Which of these is measured in volts (V)? (a) voltage (b) current (c) energy used each second (d) the flow of charge
23. 23.True or false: how much a part resists is measured in amperes (A). (a) True (b) False
24. 24.📏 How many kilowatts (kW) is 3950 W? =
25. 25.True or false: power is measured in amperes (A). (a) True (b) False
26. 26.📏 How many kilowatts (kW) is 850 W? =
27. 27.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water tank lid (b) the water pressure (c) the pipe colour (d) the tap handle
28. 28.📏 How many amperes (A) is 2120 mA? =
29. 29.📏 How many kilowatts (kW) is 3800 W? =
30. 30.📏 How many ohms (Ω) is 0.4 kΩ?
31. 31.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
32. 32.True or false: the ammeter measures voltage. (a) False (b) True
33. 33.True or false: voltage is measured in amperes (A). (a) False (b) True
34. 34.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
35. 35.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
36. 36.📏 How many milliamperes (mA) is 2.18 A?
37. 37.📏 How many ohms (Ω) is 0.1 kΩ?
38. 38.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
39. 39.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
40. 40.📏 How many amperes (A) is 1950 mA? =

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