Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 915 · 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.True or false: energy used each second is measured in watts (W). (a) True (b) False
2. 2.True or false: the voltmeter is joined in series. (a) True (b) False
3. 3.📏 How many milliamperes (mA) is 0.65 A?
4. 4.📏 Which unit measures the push of a cell? (a) ampere (A) (b) ohm (Ω) (c) watt (W) (d) volt (V)
5. 5.Which of these is measured in watts (W)? (a) voltage (b) energy used each second (c) current (d) the flow of charge
6. 6.📏 How many watts (W) is 2.2 kW?
7. 7.Which of these is measured in amperes (A)? (a) energy used each second (b) voltage (c) current (d) resistance
8. 8.📏 How many amperes (A) is 2500 mA? =
9. 9.📏 How many milliamperes (mA) make 1 ampere? (a) 100 (b) 60 (c) 1000 (d) 10
10. 10.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) a narrow pipe (c) the water pressure (d) the pipe colour
11. 11.Which of these is measured in ohms (Ω)? (a) voltage (b) power (c) how much a part resists (d) the flow of charge
12. 12.True or false: the ammeter measures current. (a) False (b) True
13. 13.📏 Which unit measures resistance? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
14. 14.True or false: energy used each second is measured in amperes (A). (a) True (b) False
15. 15.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) a narrow pipe (c) the flow of water (d) the water pressure
16. 16.True or false: how much a part resists is measured in ohms (Ω). (a) False (b) True
17. 17.📏 How many watts (W) is 4.3 kW?
18. 18.📏 How many ohms (Ω) is 2.9 kΩ?
19. 19.📏 How many watts (W) is 0.6 kW?
20. 20.📏 How many milliamperes (mA) is 2.48 A?
21. 21.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
22. 22.True or false: power is measured in volts (V). (a) False (b) True
23. 23.True or false: the voltmeter measures voltage. (a) True (b) False
24. 24.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
25. 25.Which of these is measured in volts (V)? (a) current (b) resistance (c) how much a part resists (d) voltage
26. 26.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
27. 27.📏 Which unit measures the flow of charge? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
28. 28.True or false: voltage is measured in amperes (A). (a) False (b) True
29. 29.📏 How many ohms (Ω) is 7.7 kΩ?
30. 30.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 100 (c) 10 (d) 1000
31. 31.📏 How many milliamperes (mA) is 1.14 A?
32. 32.📏 How many milliamperes (mA) is 1.04 A?
33. 33.True or false: the push of a cell is measured in volts (V). (a) True (b) False
34. 34.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter
35. 35.📏 How many ohms (Ω) is 8.9 kΩ?
36. 36.True or false: resistance is measured in ohms (Ω). (a) True (b) False
37. 37.📏 Which unit measures current? (a) ohm (Ω) (b) watt (W) (c) volt (V) (d) ampere (A)
38. 38.True or false: the voltmeter measures current. (a) False (b) True
39. 39.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water pressure (c) the pipe colour (d) the water tank lid
40. 40.📏 Which unit measures energy used each second? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)

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