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A vector vecA is along the positive z-ax...

A vector `vecA` is along the positive z-axis and its vector product with another vector `vecB` is zero, then vector `vecB` could be :

A

`hati + hatj`

B

`4hatj`

C

`hatj + hatk`

D

`-7hatk`

Text Solution

Verified by Experts

The correct Answer is:
D
The vector product of two non-zero vectors is zero of they are in the same direction or in the opposite direction. Hence vector `vecB` must be parallel or antiparallel to vector `vecA`. along `pm z` - axis
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