Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 323 · 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.📏 How many milliamperes (mA) is 2.01 A?
2. 2.📏 Which unit measures voltage? (a) watt (W) (b) ohm (Ω) (c) volt (V) (d) ampere (A)
3. 3.True or false: energy used each second is measured in watts (W). (a) False (b) True
4. 4.True or false: the push of a cell is measured in volts (V). (a) True (b) False
5. 5.📏 How many milliamperes (mA) is 2.56 A?
6. 6.True or false: the voltmeter measures voltage. (a) False (b) True
7. 7.📏 In the water-pipe picture of a circuit, resistance is like … (a) a bigger tank (b) the water pressure (c) a narrow pipe (d) the flow of water
8. 8.Which of these is measured in watts (W)? (a) resistance (b) current (c) energy used each second (d) voltage
9. 9.📏 In the water-pipe picture of a circuit, voltage is like … (a) the pipe colour (b) the water pressure (c) the water tank lid (d) the tap handle
10. 10.Which of these is measured in amperes (A)? (a) the flow of charge (b) the push of a cell (c) voltage (d) resistance
11. 11.📏 How many milliamperes (mA) is 2.62 A?
12. 12.📏 Which unit measures resistance? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
13. 13.True or false: the voltmeter is joined across a part. (a) False (b) True
14. 14.Which of these is measured in ohms (Ω)? (a) power (b) the flow of charge (c) the push of a cell (d) resistance
15. 15.Which of these is measured in volts (V)? (a) voltage (b) the flow of charge (c) resistance (d) current
16. 16.Which of these is measured in amperes (A)? (a) current (b) voltage (c) how much a part resists (d) power
17. 17.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
18. 18.📏 How many ohms make 1 kilo-ohm (kΩ)? (a) 10 (b) 1000 (c) 1024 (d) 100
19. 19.📏 Which unit measures energy used each second? (a) ampere (A) (b) watt (W) (c) ohm (Ω) (d) volt (V)
20. 20.True or false: the ammeter measures current. (a) False (b) True
21. 21.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 10 (c) 100 (d) 60
22. 22.📏 How many watts (W) is 3.1 kW?
23. 23.Which of these is measured in volts (V)? (a) the push of a cell (b) the flow of charge (c) power (d) energy used each second
24. 24.Which of these is measured in watts (W)? (a) current (b) power (c) how much a part resists (d) the flow of charge
25. 25.📏 How many amperes (A) is 1320 mA? =
26. 26.📏 How many kilowatts (kW) is 4750 W? =
27. 27.True or false: the ammeter is joined across a part. (a) True (b) False
28. 28.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the water pressure (c) the flow of water (d) the pipe colour
29. 29.📏 How many kilo-ohms (kΩ) is 3300 Ω? =
30. 30.📏 How many kilo-ohms (kΩ) is 6000 Ω? =
31. 31.True or false: voltage is measured in volts (V). (a) True (b) False
32. 32.Which of these is measured in ohms (Ω)? (a) how much a part resists (b) the push of a cell (c) voltage (d) current
33. 33.📏 How many kilowatts (kW) is 3600 W? =
34. 34.📏 Voltmeter or ammeter: which one measures voltage? (a) voltmeter (b) ammeter
35. 35.True or false: resistance is measured in ohms (Ω). (a) True (b) False
36. 36.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
37. 37.True or false: the ammeter is joined in series. (a) True (b) False
38. 38.📏 How many amperes (A) is 2280 mA? =
39. 39.📏 How many kilowatts (kW) is 3100 W? =
40. 40.📏 How many amperes (A) is 810 mA? =

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