Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 937 · 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, voltage is like … (a) the water pressure (b) the pipe colour (c) the tap handle (d) the water tank lid
2. 2.📏 How many amperes (A) is 1080 mA? =
3. 3.Which of these is measured in ohms (Ω)? (a) energy used each second (b) resistance (c) voltage (d) the push of a cell
4. 4.True or false: resistance is measured in watts (W). (a) False (b) True
5. 5.📏 How many milliamperes (mA) is 0.61 A?
6. 6.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
7. 7.True or false: the voltmeter is joined in series. (a) True (b) False
8. 8.📏 How many watts (W) is 0.6 kW?
9. 9.📏 How many kilo-ohms (kΩ) is 9400 Ω? =
10. 10.Which of these is measured in watts (W)? (a) voltage (b) energy used each second (c) current (d) the flow of charge
11. 11.True or false: the voltmeter measures voltage. (a) True (b) False
12. 12.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
13. 13.Which of these is measured in watts (W)? (a) the flow of charge (b) power (c) the push of a cell (d) voltage
14. 14.Which of these is measured in volts (V)? (a) the flow of charge (b) current (c) how much a part resists (d) the push of a cell
15. 15.Which of these is measured in volts (V)? (a) energy used each second (b) voltage (c) power (d) how much a part resists
16. 16.📏 Which unit measures the push of a cell? (a) ampere (A) (b) ohm (Ω) (c) volt (V) (d) watt (W)
17. 17.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
18. 18.📏 Which unit measures voltage? (a) volt (V) (b) watt (W) (c) ampere (A) (d) ohm (Ω)
19. 19.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1024 (b) 10 (c) 1000 (d) 100
20. 20.📏 How many milliamperes (mA) is 1.26 A?
21. 21.📏 How many milliamperes (mA) is 2.23 A?
22. 22.True or false: current is measured in amperes (A). (a) False (b) True
23. 23.True or false: energy used each second is measured in watts (W). (a) False (b) True
24. 24.📏 How many amperes (A) is 810 mA? =
25. 25.📏 How many kilowatts (kW) is 1250 W? =
26. 26.📏 How many milliamperes (mA) is 0.01 A?
27. 27.📏 How many watts (W) is 3.4 kW?
28. 28.True or false: the voltmeter is joined across a part. (a) False (b) True
29. 29.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) a narrow pipe (c) the water pressure (d) the flow of water
30. 30.True or false: the ammeter measures voltage. (a) False (b) True
31. 31.True or false: resistance is measured in ohms (Ω). (a) False (b) True
32. 32.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 60 (c) 100 (d) 10
33. 33.True or false: power is measured in amperes (A). (a) True (b) False
34. 34.📏 Which unit measures energy used each second? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
35. 35.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
36. 36.📏 How many ohms (Ω) is 4.2 kΩ?
37. 37.📏 How many kilowatts (kW) is 3000 W? =
38. 38.📏 How many kilowatts (kW) is 3650 W? =
39. 39.📏 How many kilo-ohms (kΩ) is 2400 Ω? =
40. 40.📏 How many ohms (Ω) is 7.8 kΩ?

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