If A - 3- - and B - 2- then value of - A-B- will be

|A×B| = |(3î+ ĵ) × (2 î)| = |(3î× 2 î)+ 2 (ĵ×î)| = |2 ( k̂)|=2 ...

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Byju's Answer

Standard XI

Physics

Multiplication with Vectors

If A = 3î+ ĵ ...

Question

If $\to A = 3^i +^j$ and $\to B = 2^i$ then value of $| \to A \times \to B |$ will be

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Solution

The correct option is B $2$
$| \to A \times \to B | = | (3^i +^j) \times (2^i) |$
$= | (3^i \times 2^i) + 2 (^j \times^i) |$
$= | 2 (-^k) | = 2$

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If →A=3^i+^j and →B=2^i then value of |→A×→B| will be

The correct option is B 2|→A×→B|=|(3^i+^j)×(2^i)| =|(3^i×2^i)+2(^j×^i)| =|2(−^k)|=2

If $\to A = 3^i +^j$ and $\to B = 2^i$ then value of $| \to A \times \to B |$ will be

The correct option is B $2$
$| \to A \times \to B | = | (3^i +^j) \times (2^i) |$
$= | (3^i \times 2^i) + 2 (^j \times^i) |$
$= | 2 (-^k) | = 2$