Chapter 1 - Activity sheet 4

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Chapter 1: Principles of electrical science
Activity sheet 1.4: Transposition 2
Aims and objectives
At the end of this activity, you should be able to:
● complete formula transposition using divide, multiply, square and square root.
Instructions
Transpose the following formulae to make the highlighted character the subject of the
formula.
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(2fC)
1.
XC 
2.
XL  2fL
3.
4.
5.
Vp
Vs
Vp
Vs
Np
Ns

Np

Np

Is
Ip
Ns
Ns
(C)
(L)
(Np)
(Ns)
(Is)
6. Z2 = R2 + X2
(X)
7. Z = √(R2 + X2)
(R)
8. P = √(3)VLILCosθ
(IL)
9. S 
(n s  nr )
ns
(nr)
10. E 
Icos θ
d2
(d)
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