Master Electromagnetism on the GRE with Problem 55 Explained

In summary, the conversation is about a question regarding problem 55 in an attached file related to the GRE. The answer appears to be (A), but there is confusion about whether the correct answer should be (C) due to interference. It is then mentioned that the two EM fields are perpendicular and the resultant field at a specific point can be represented by a vector with constants, and the question is asking for the length of this vector.
  • #1
Silviu
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Hello! I have a question about a GRE problem. It is problem 55 in the attached file. So the answer seems to be (A) but I am a bit confused. Isn't this basically interference, so the right answer would be (C)?
 

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  • #2
Remember that the two EM fields are perpendicular to each other. Since after the mentioned OPD the waves are in phase, the resultant field at that point in space will be ##\mathbf E(t) = \hat x E_1 \cos(\omega t + \phi) + \hat y E_2 \cos(\omega t + \phi)## where ##\omega## and ##\phi## are constants. What is the length of this vector?
 
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1. What is the GRE?

The GRE (Graduate Record Examination) is a standardized test used for admissions to graduate and business schools in the United States and other countries. It measures verbal reasoning, quantitative reasoning, analytical writing, and critical thinking skills.

2. Why is electromagnetism important on the GRE?

Electromagnetism is an important topic on the GRE because it is a fundamental concept in physics and engineering. It is also a common topic in graduate-level programs, such as electrical engineering, physics, and materials science.

3. What is Problem 55 in the Master Electromagnetism section?

Problem 55 is a practice problem in the Master Electromagnetism section of the GRE. It tests your understanding of electromagnetic concepts, such as Gauss's Law and Coulomb's Law, and your ability to apply them to solve problems.

4. How can Problem 55 help me prepare for the GRE?

Problem 55 can help you prepare for the GRE by testing your knowledge and application of electromagnetism concepts, which are essential for success on the exam. By understanding and solving this problem, you can improve your overall understanding of electromagnetic principles and increase your confidence for the GRE.

5. Are there any tips for mastering electromagnetism on the GRE?

Yes, there are several tips for mastering electromagnetism on the GRE. First, make sure to review the fundamental principles and equations of electromagnetism. Next, practice solving problems, such as Problem 55, to improve your problem-solving skills. Additionally, familiarize yourself with the format and structure of the GRE so you can effectively manage your time during the exam.

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