Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 664 · 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.Which of these is measured in ohms (Ω)? (a) voltage (b) how much a part resists (c) the flow of charge (d) current
2. 2.Which of these is measured in ohms (Ω)? (a) voltage (b) resistance (c) current (d) energy used each second
3. 3.📏 Which unit measures resistance? (a) ampere (A) (b) volt (V) (c) watt (W) (d) ohm (Ω)
4. 4.📏 Which unit measures current? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
5. 5.📏 In the water-pipe picture of a circuit, resistance is like … (a) a narrow pipe (b) a bigger tank (c) the water pressure (d) the flow of water
6. 6.📏 Which unit measures power? (a) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
7. 7.📏 Voltmeter or ammeter: which one is joined across a part? (a) voltmeter (b) ammeter
8. 8.Which of these is measured in watts (W)? (a) current (b) the push of a cell (c) voltage (d) energy used each second
9. 9.Which of these is measured in amperes (A)? (a) the push of a cell (b) resistance (c) power (d) the flow of charge
10. 10.📏 How many kilowatts (kW) is 2500 W? =
11. 11.📏 How many milliamperes (mA) is 2.19 A?
12. 12.📏 How many milliamperes (mA) is 0.55 A?
13. 13.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
14. 14.📏 Which unit measures voltage? (a) watt (W) (b) ampere (A) (c) ohm (Ω) (d) volt (V)
15. 15.Which of these is measured in volts (V)? (a) power (b) current (c) the flow of charge (d) the push of a cell
16. 16.True or false: the ammeter is joined across a part. (a) True (b) False
17. 17.📏 Which unit measures energy used each second? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
18. 18.📏 How many watts (W) is 2.7 kW?
19. 19.📏 How many ohms (Ω) is 8.7 kΩ?
20. 20.📏 How many kilowatts (kW) is 3350 W? =
21. 21.📏 How many kilowatts (kW) is 3500 W? =
22. 22.True or false: the push of a cell is measured in amperes (A). (a) True (b) False
23. 23.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 1000 (b) 100 (c) 1024 (d) 10
24. 24.📏 How many milliamperes (mA) is 0.47 A?
25. 25.True or false: the ammeter measures voltage. (a) False (b) True
26. 26.📏 How many kilo-ohms (kΩ) is 9700 Ω? =
27. 27.Which of these is measured in volts (V)? (a) resistance (b) the flow of charge (c) voltage (d) current
28. 28.📏 How many kilowatts (kW) is 3400 W? =
29. 29.📏 How many kilowatts (kW) is 750 W? =
30. 30.📏 Which unit measures the push of a cell? (a) ohm (Ω) (b) ampere (A) (c) watt (W) (d) volt (V)
31. 31.📏 How many amperes (A) is 1720 mA? =
32. 32.True or false: the voltmeter is joined across a part. (a) False (b) True
33. 33.📏 In the water-pipe picture of a circuit, voltage is like … (a) the tap handle (b) the water tank lid (c) the water pressure (d) the pipe colour
34. 34.📏 How many ohms (Ω) is 4.3 kΩ?
35. 35.📏 How many watts (W) is 0.2 kW?
36. 36.📏 How many watts (W) is 0.9 kW?
37. 37.True or false: the ammeter measures current. (a) True (b) False
38. 38.📏 In the water-pipe picture of a circuit, current is like … (a) the flow of water (b) the pipe colour (c) the water pressure (d) a narrow pipe
39. 39.📏 How many kilo-ohms (kΩ) is 4100 Ω? =
40. 40.True or false: voltage is measured in watts (W). (a) True (b) False

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