Question Detail

PHY 102 Electromagnetic Induction 2 Objective Question
Take CBT

Question

In a transformer, what is the undesirable effect of Eddy Currents?
Options
A They increase the magnetic flux in the core.
B They cause a loss of energy, transforming it into useless heat.
Correct Answer
C They enhance the efficiency of power transfer.
D They lead to an increase in the output voltage.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 28 explains: 'Because of the tendency of eddy currents to oppose, eddy currents cause a loss of energy. Eddy currents transform more useful forms of energy, such as kinetic energy, into heat, which isn't generally useful.' Page 29 adds that they 'weaken the flux created by the primary coil'.

Hint

Consider the overall impact of eddy currents on the energy efficiency of devices like transformers.

Question Info

Course: PHY 102
Topic: Electromagnetic Induction 2
Type: Objective
Difficulty: Not specified
Question 736 of 1819
Previous Course Details Next