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PHY 102 Test Compilation PHY 102 26 Objective Question
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Question

A 30 cm long solenoid has 2000 turns of wire on an iron rod whose cross-sectional area is 1.5 cm2. Calculate the average emf induced in the solenoid as the current decreases from 0.6 A to 0.1 A in 0.03 s. The relative permeability of the iron core is 600.
Options
A 2.5 V
B 0.25 V
C -25 V
Correct Answer
D +25 V
Correct Answer

Option C is the correct answer.

Detailed Explanation

L=(mu0 mur N2 A)/length=1.508H. emf=L(dI/dt)=25.1V, taken negative by Lenz's law convention.

Hint

L=(mu0 mur N2 A)/length=1.508H.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 26
Type: Objective
Difficulty: Not specified
Question 1513 of 1819
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