Linnea Asked :
Q. Curl of gradient of a vector is
A. Unity
B. Zero
C. Null vector
D. Depends on the constants of the vector
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Dapzoi 
Answer: C
Explanation: Gradient of any function leads to a vector. Similarly curl of that vector gives another vector, which is always zero for all constants of the vector. A zero value in vector is always termed as null vector(not simply a zero).
Explanation: Gradient of any function leads to a vector. Similarly curl of that vector gives another vector, which is always zero for all constants of the vector. A zero value in vector is always termed as null vector(not simply a zero).