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PHY 102 Test Compilation PHY 102 26 Objective Question
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Question

Two wires A and B with circular cross-sections have identical lengths and are made of the same material. Yet, wire A has four times the resistance of wire B. How many times greater is the diameter of wire B than that of wire A?
Options
A 2.5
B 4
C 2
Correct Answer
D 8
Correct Answer

Option C is the correct answer.

Detailed Explanation

R proportional to 1/d2. R_A=4R_B => d_B=2d_A.

Hint

R proportional to 1/d2.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 26
Type: Objective
Difficulty: Not specified
Question 1510 of 1819
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