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PHY 102 Test Compilation PHY 102 21 Objective Question
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Question

Determine the electric flux emerging from a circular surface of radius 0.025 m if the electric field strength is 100 V/m and the field lines make an angle of 30 degrees with the surface.
Options
A 0.098 N.m2/C
Correct Answer
B 0.170 N.m2/C
C 0.090 N.m2/C
D 0.196 N.m2/C
Correct Answer

Option A is the correct answer.

Detailed Explanation

CAREFUL: the angle given is with the SURFACE, but the formula uses the angle with the NORMAL. Angle with normal = 90 - 30 = 60 degrees. A = pi r2 = pi(0.025)2 = 1.9635x10-3 m2 Phi = EA cos(60) = (100)(1.9635x10-3)(0.5) = 0.098 N.m2/C.

Hint

CAREFUL: the angle given is with the SURFACE, but the formula uses the angle with the NORMAL.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 21
Type: Objective
Difficulty: Not specified
Question 1333 of 1819
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