Question Detail

PHY 102 Electromagnetic Induction 2 Objective Question
Take CBT

Question

What is an Eddy Current?
Options
A A current that flows in a straight line through a conductor due to a static magnetic field.
B A circulating current induced in a metallic part of a system (like an iron core) due to a changing magnetic field.
Correct Answer
C A current used to demagnetize materials in a transformer.
D A type of direct current (DC) used in specialized electrical circuits.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 25 and 28 define eddy currents. Page 25 states: 'The induced emf within this metallic part of the system causes a circulating current to flow around it and this type of core current is known as an Eddy Current.' Page 28 further clarifies: 'An eddy current is a current set up in a conductor in response to a changing magnetic field. They flow in closed loops in a plane perpendicular to the magnetic field.'

Hint

Think about currents induced in bulk conductive materials, not just wires.

Question Info

Course: PHY 102
Topic: Electromagnetic Induction 2
Type: Objective
Difficulty: Not specified
Question 762 of 1819
Previous Course Details Next