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Standard XII

Physics

Vectors and Its Types

A vector A ...

Question

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

^i +^j

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4^i

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^i +^k

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- 7^k

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Solution

The correct option is C $- 7^k$
$\to A = A^k$
$\to A \cdot \to B = 0$
$\Rightarrow$ for suitable multiply which makes product $= 0$ , necessary $= - 7^k$
$\to B = - 7^k$

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A vector A is along the positive z−axis and its vector product with another vector B is zero, then vector B could be:

The correct option is C −7^k→A=A^k→A⋅→B=0⇒ for suitable multiply which makes product =0, necessary =−7^k→B=−7^k

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

The correct option is C $- 7^k$
$\to A = A^k$
$\to A \cdot \to B = 0$
$\Rightarrow$ for suitable multiply which makes product $= 0$ , necessary $= - 7^k$
$\to B = - 7^k$