Which of the following represents the unit of magnetic flux density ?
Show answer Hide answer
Answer: C. tesla
Explanation
The tesla is universally recognized as the standard international unit for magnetic flux density. One tesla represents one weber of magnetic flux per square meter of area. Standardized measurement units ensure clear communication among scientists and electrical engineers globally. Magnetic flux density quantifies the strength of a magnetic field over a specific surface. Nikola Tesla made foundational contributions to the study of electromagnetism and electrical engineering. The International System of Units defines derived units based on fundamental physical quantities.
Physicists measure magnetic fields in particle accelerators and magnetic resonance imaging medical equipment. Electrical engineers specify magnetic flux density when designing motors, generators, and transformers. Accurate unit identification prevents costly calculation errors in technical specifications and research. The weber is the standard international unit used for measuring total magnetic flux. Lumens represent the SI unit of luminous flux used in lighting and optics applications. Choosing none of the above is incorrect because the tesla is explicitly the right unit.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. What is a dynamometer wattmeter utilized for______________?
Show answer Hide answer
Answer: A. both D.C. and A.C.
Dynamometer wattmeters utilize two sets of coils carrying current proportional to voltage and load. Reversing current direction in both coils simultaneously maintains the same deflecting torque direction. This dual-coil...
Q2. Two infinitely long parallel conductors in a vacuum separated by 1 meter with 1 ampere flowing in each exert what force on one another_________________?
Show answer Hide answer
Answer: D. 2x 1(T7 N/m)
The force per unit length between two parallel conductors 1 meter apart carrying 1 A is 2 x 10^-7 N/m. This exact numerical value forms the historical base definition for the ampere in SI units. Applying the parallel wir...
Q3. Which of the provided statements is accurate ?
Show answer Hide answer
Answer: D. The magnetic flux inside the exciting coil is same as on its outside surface
Symmetry and uniform winding principles dictate that total interior flux equals exterior return flux. Magnetic field lines form continuous closed loops throughout the entire exciting coil structure. The distribution of m...
Q4. What features are built into a power factor meter________________?
Show answer Hide answer
Answer: A. one current circuit and two pressure circuits
Power factor meters require multiple circuits to measure the phase angle between voltage and current. One current circuit responds to the load current flowing through the electrical system. Two pressure circuits connect...
Q5. With what device is a phase shifting transformer paired_______________?
Show answer Hide answer
Answer: B. Drysdale potentiometer
Drysdale potentiometers require an external phase shifting transformer to adjust the alternating current phase angle accurately. This specific pairing permits precise measurement of alternating voltage by matching both m...
Q6. Which statement among the choices is correct ?
Show answer Hide answer
Answer: A. The conductivity of ferrites is better than ferromagnetic materials
Ferrites generally have much lower electrical conductivity than metallic ferromagnetic materials, reducing eddy current losses.