Ambiguity in Eddy Current Questions in the Physics NEET UG 2019 Exam
The National Eligibility cum Entrance Test (NEET UG) is a significant examination for aspiring medical students and biomedical professionals in India. This test covers a wide range of subjects, with Physics being one of the key disciplines. In the 2019 session, the NEET UG examination faced some controversy regarding a specific question based on eddy currents. This article aims to dissect the issue, explore the confusion, and understand the implications for future exam preparation.
Introduction to Eddy Currents
Eddy currents, a fascinating phenomenon in physics, occur when a conductor is placed in a changing magnetic field. The induced electric currents form closed loops, which are often referred to as eddy currents. This property has various practical applications, such as in magnetic braking, electric circuits, and even medical imaging techniques. Understanding eddy currents is crucial for students appearing in NEET UG and other competitive exams.
The Controversial Question in NEET UG 2019
During the Physics section of the NEET UG 2019, a specific question concerning eddy currents was widely discussed post-exam day. The question presented two possible answers, both of which were considered correct by many. This ambiguity led to confusion among students and educators alike.
Question Analysis and Discussion
The question at hand was as follows:
"Which of the following can be used to generate eddy currents?
The options provided were:
Electromagnet: An electromagnet is a device that uses an electric current to produce a magnetic field. Electric Heater: An electric heater generates heat by passing electricity through a resistive component.Much to the surprise of many participants, both options appeared to be correct. Let's delve into the reasoning behind each answer.
Electromagnet
The Electromagnet is a device that uses an electric current to generate a magnetic field. When a conductor is placed in a varying magnetic field, it experiences a force that induces eddy currents, according to Faraday's law of electromagnetic induction. Hence, an electromagnet can certainly generate eddy currents.
Electric Heater
The Electric Heater is typically designed to convert electrical energy into heat. However, the resistive element (usually a coil or wire) in an electric heater can generate a magnetic field when an alternating current passes through it. Similar to an electromagnet, the changing magnetic field can induce eddy currents in nearby conductors.
Community Response and Expert Opinions
The reaction to this question was mixed, with many students expressing confusion and dissatisfaction. The ambiguity led to a discussion about whether both answers should be considered correct or if one should be given preference. Expert response varied, with some suggesting a combination of both as acceptable, while others proposed a stricter interpretation based on the context of the exam.
Implications for Future Exams
The incident highlights the importance of clear and unambiguous question wording in high-stakes exams like NEET UG. It also underscores the need for consistent marking and interpretation guidelines to avoid confusion among candidates. For future exam preparation, students and educators alike should remain vigilant and be prepared for any unexpected nuances in question phrasing.
Conclusion
The eddy current question in theNEET UG 2019 serves as a reminder of the complexities involved in exam design and the importance of clear communication in educational assessments. Understanding such ambiguities and their resolution can equip students better for future challenges in their academic and professional endeavors.
Keywords: NEET UG 2019, Eddy Current, Physics Questions