Question Detail

PHY 102 Test Compilation PHY 102 18 Objective Question
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Question

Why is electrical energy usually transmitted at high voltage?
Options
A the resistance of the transmission cables is as small as possible
B the transmission cables are safer to handle
C as little energy as possible is wasted in the transmission cables
Correct Answer
D the current in the transmission cables is as large as possible
Correct Answer

Option C is the correct answer.

Detailed Explanation

Since power loss = I²R, transmitting at high voltage keeps the current low for a given power, minimizing resistive (I²R) losses in the cables.

Hint

Think about the I²R power loss formula and how raising voltage affects current for the same power delivered.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 18
Type: Objective
Difficulty: Not specified
Question 1135 of 1819
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