Electronics Worksheet: Voltage, Current and Resistance

Electronics lesson 11: Voltage, current and resistance · Set 507 · 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) volt (V) (b) watt (W) (c) ohm (Ω) (d) ampere (A)
2. 2.Which of these is measured in volts (V)? (a) voltage (b) current (c) resistance (d) the flow of charge
3. 3.📏 How many kilowatts (kW) is 550 W? =
4. 4.📏 How many milliamperes (mA) is 0.59 A?
5. 5.📏 How many milliamperes (mA) is 2.54 A?
6. 6.📏 How many ohms (Ω) is 3.8 kΩ?
7. 7.True or false: power is measured in watts (W). (a) True (b) False
8. 8.Which of these is measured in volts (V)? (a) power (b) resistance (c) the push of a cell (d) current
9. 9.📏 How many milliamperes (mA) make 1 ampere? (a) 1000 (b) 10 (c) 60 (d) 100
10. 10.📏 In the water-pipe picture of a circuit, voltage is like … (a) the water pressure (b) the tap handle (c) the water tank lid (d) the pipe colour
11. 11.📏 How many kilowatts (kW) is 2400 W? =
12. 12.True or false: the flow of charge is measured in amperes (A). (a) False (b) True
13. 13.📏 Which unit measures resistance? (a) ohm (Ω) (b) volt (V) (c) watt (W) (d) ampere (A)
14. 14.📏 Which unit measures the flow of charge? (a) watt (W) (b) ohm (Ω) (c) ampere (A) (d) volt (V)
15. 15.📏 How many milliamperes (mA) is 1.75 A?
16. 16.True or false: the voltmeter measures current. (a) True (b) False
17. 17.📏 How many ohms (Ω) is 3.9 kΩ?
18. 18.📏 How many ohms (Ω) is 1.4 kΩ?
19. 19.📏 How many amperes (A) is 240 mA? =
20. 20.True or false: current is measured in ohms (Ω). (a) False (b) True
21. 21.📏 How many amperes (A) is 1680 mA? =
22. 22.📏 Voltmeter or ammeter: which one is joined in series? (a) voltmeter (b) ammeter
23. 23.True or false: voltage is measured in volts (V). (a) True (b) False
24. 24.📏 Which unit measures how much a part resists? (a) ohm (Ω) (b) ampere (A) (c) volt (V) (d) watt (W)
25. 25.📏 Which unit measures current? (a) ampere (A) (b) watt (W) (c) volt (V) (d) ohm (Ω)
26. 26.📏 In the water-pipe picture of a circuit, resistance is like … (a) the water pressure (b) the flow of water (c) a narrow pipe (d) a bigger tank
27. 27.📏 How many ohms (Ω) is 4.6 kΩ?
28. 28.Which of these is measured in ohms (Ω)? (a) energy used each second (b) power (c) current (d) resistance
29. 29.True or false: the flow of charge is measured in ohms (Ω). (a) True (b) False
30. 30.Which of these is measured in amperes (A)? (a) voltage (b) energy used each second (c) resistance (d) current
31. 31.📏 How many watts (W) is 0.6 kW?
32. 32.📏 How many kilo-ohms (kΩ) is 4200 Ω? =
33. 33.True or false: the ammeter is joined in series. (a) True (b) False
34. 34.True or false: the ammeter measures current. (a) True (b) False
35. 35.📏 How many milliamperes (mA) is 0.41 A?
36. 36.Which of these is measured in watts (W)? (a) resistance (b) the flow of charge (c) power (d) voltage
37. 37.📏 How many milliamperes (mA) is 1.2 A?
38. 38.📏 In the water-pipe picture of a circuit, current is like … (a) a narrow pipe (b) the pipe colour (c) the flow of water (d) the water pressure
39. 39.📏 How many watts (W) is 2.2 kW?
40. 40.📏 Voltmeter or ammeter: which one measures current? (a) ammeter (b) voltmeter

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