The test specimen explained in Question 1(e) maintains the same mechanical properties even after the rod is broken down from 8 mm to a 2 mm diameter copper cable. Answer the following concerning a 2 mm diameter copper cable with a length of 10 m to be used in domestic wiring under a voltage of 220V: (i) Explain what is meant by the rexistivity of the copper cable. What influences this resistivity ? Determine the resistivity of the 2 mm copper cable mentioned above when a current of 15 amps is used. (ii) (ii) Determine the electrical conductivity of the copper cable.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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QUESTION TWO
The test specimen explained in Question 1(c) maintains the same mechanical properties evEn
after the rod is broken down from 8 mm to a 2 mm diameter copper cable. Answer the following
concerning a 2 mm diameter copper cable with a length of 10 m to be used in domestic wiring
under a voltage of 220V:
Explain what is meant by the resistivity of the copper cable. What influences this
resistivity ?
(i)
(ii)
Determine the resistivity of the 2 mm copper cable mentioned above when a current
of 15 amps is used.
(ii1)
Determine the electrical conductivity of the copper cable.
(iv)
Using neat sketches where possible, discuss how the p-n junction of a semi-conductor
is formed.
Transcribed Image Text:QUESTION TWO The test specimen explained in Question 1(c) maintains the same mechanical properties evEn after the rod is broken down from 8 mm to a 2 mm diameter copper cable. Answer the following concerning a 2 mm diameter copper cable with a length of 10 m to be used in domestic wiring under a voltage of 220V: Explain what is meant by the resistivity of the copper cable. What influences this resistivity ? (i) (ii) Determine the resistivity of the 2 mm copper cable mentioned above when a current of 15 amps is used. (ii1) Determine the electrical conductivity of the copper cable. (iv) Using neat sketches where possible, discuss how the p-n junction of a semi-conductor is formed.
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