Unit 103: Electrical scientific principles and technologies

• 0.375

• 2.67

• 0.725

• 0.4

2. 2. 13m of a 50m drum of cable is used. What is the percentage left on the drum?

• 26%

• 50%

• 74%

• 13%

5. 5. How can 25kV be expressed in a different way?

6. 6. 23mA can also be shown as how?

• 23 ×10³A

• 23 ×10⁶A

• 23 ×10^-3A

• 23 ×10^-6A

7. 7. What is the missing side of the triangle shown below?

• 7.5

• 9.3

• 6.9

• 9.5

8. 8. What formula will give the value of the hypotenuse of the triangle below?

• h = 5.2 / cos 36

• h = 5.2 × cos 36

• h = 5.2 / sin 36

• h = 5.2 × sin 36

9. 9. What formula will give the angle indicated, θ, in the triangle shown?

• θ = cos⁻¹(6.6 / 7)

• θ = sin⁻¹(6.6 / 7)

• θ = cos⁻¹(6.6 / 7)

• θ = sin⁻¹(6.6 / 7)

10. 10. What is the value of the resistance, R, in the triangle below?

• 7 ohms

• 5.3 ohms

• 3.8 ohms

• 6 ohms