Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 188 · 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 unit measures power? (a) watt (W) (b) ampere (A) (c) volt (V) (d) ohm (Ω)
2. 2.Which of these is measured in watts (W)? (a) the flow of charge (b) how much a part resists (c) current (d) power
3. 3.📏 In the water-pipe picture of a circuit, current is like … (a) the pipe colour (b) a narrow pipe (c) the flow of water (d) the water pressure
4. 4.True or false: energy used each second is measured in watts (W). (a) True (b) False
5. 5.Which of these is measured in amperes (A)? (a) current (b) power (c) energy used each second (d) how much a part resists
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) the water pressure (b) a narrow pipe (c) the flow of water (d) a bigger tank
8. 8.True or false: resistance is measured in volts (V). (a) True (b) False
9. 9.True or false: voltage is measured in volts (V). (a) False (b) True
10. 10.📏 How many watts (W) is 0.7 kW?
11. 11.📏 Which unit measures resistance? (a) volt (V) (b) ohm (Ω) (c) ampere (A) (d) watt (W)
12. 12.📏 How many kilo-ohms (kΩ) is 1100 Ω? =
13. 13.📏 How many watts (W) is 1.2 kW?
14. 14.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 10 (c) 100 (d) 60
15. 15.📏 Voltmeter or ammeter: which one measures voltage? (a) ammeter (b) voltmeter
16. 16.📏 How many milliamperes (mA) is 0.34 A?
17. 17.True or false: the ammeter measures voltage. (a) False (b) True
18. 18.📏 How many watts (W) is 0.1 kW?
19. 19.📏 How many milliamperes (mA) is 0.09 A?
20. 20.📏 How many kilo-ohms (kΩ) is 3900 Ω? =
21. 21.True or false: the ammeter is joined in series. (a) False (b) True
22. 22.📏 Voltmeter or ammeter: which one measures current? (a) voltmeter (b) ammeter
23. 23.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the water tank lid (c) the tap handle (d) the pipe colour
24. 24.📏 Voltmeter or ammeter: which one is joined across a part? (a) ammeter (b) voltmeter
25. 25.📏 How many amperes (A) is 2690 mA? =
26. 26.📏 Which unit measures current? (a) ohm (Ω) (b) watt (W) (c) ampere (A) (d) volt (V)
27. 27.📏 How many watts (W) is 4.1 kW?
28. 28.📏 How many milliamperes (mA) is 2.72 A?
29. 29.True or false: voltage is measured in ohms (Ω). (a) True (b) False
30. 30.📏 How many ohms (Ω) is 2.9 kΩ?
31. 31.📏 Which unit measures how much a part resists? (a) volt (V) (b) ohm (Ω) (c) watt (W) (d) ampere (A)
32. 32.Which of these is measured in volts (V)? (a) current (b) voltage (c) power (d) energy used each second
33. 33.True or false: the voltmeter is joined across a part. (a) True (b) False
34. 34.📏 How many amperes (A) is 2350 mA? =
35. 35.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
36. 36.📏 Voltmeter or ammeter: which one is joined in series? (a) ammeter (b) voltmeter
37. 37.📏 How many watts (W) is 2.7 kW?
38. 38.True or false: current is measured in amperes (A). (a) False (b) True
39. 39.📏 How many milliamperes (mA) is 0.74 A?
40. 40.📏 How many kilowatts (kW) is 1400 W? =

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