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PHY 102 Test Compilation PHY 102 25 Objective Question
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Question

Two long parallel wires are 40 mm apart. If currents of 20 A and 30 A are applied in the same direction, find the force of attraction per unit length.
Options
A 0.3 N/m
B 3 N/m
C 30 N/m
D = (2x10-7)(20)(30)/(0.04) = 0.003 N/m.
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

F/L = mu0 I1 I2/(2pid) = (2x10-7)(20)(30)/(0.04) = 0.003 N/m.

Hint

F/L = mu0 I1 I2/(2*pi*d) = (2x10-7)(20)(30)/(0.04) = 0.003 N/m.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 25
Type: Objective
Difficulty: Not specified
Question 1477 of 1819
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