If the direction of the field and area vector is opposite then field is
Correct answer: C. Negative
- A. Positive
- B. Zero
- C. Negative
- D. None of these
Explanation
Option C is correct since flux is the dot product of field vectors and area vectors. Since flux = BACos theta If theta is 180 (that shows the vectors are in the opposite direction), the dot product will be negative. Option A is incorrect since flux will be positive if the field vector and area vector are parallel to each other (that is, theta is 0). Option B is incorrect since flux will be zero if the field vector and area vector are perpendicular to each other (that is, theta is 90 or 270). Option D is incorrect since it states none of these, which is not the case over here.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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