Essential Chemistry for IGCSE - Electricity And Chemistry (Section 1 - No. 2)
What is the purpose of the steel core in high-voltage power lines containing aluminum cables?
To increase the electrical conductivity of the cable.
To strengthen the cable.
To act as a conductor for electrical current.
To provide insulation.
Explanation
The steel core is used to add strength to the cable to prevent it from sagging and breaking.
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