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Question

A position vector is P=3^k+2^i4^j, the magnitude of component of the vector lying perpendicular to the xy and xz plane respectively are

A
3,4
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B
3,4
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C
2,4
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D
2,4
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Solution

The correct option is B 3,4
Given the position vector as P=3^k+2^i4^j
So, the component of the vector lying in perpendicular to xy plane is Pz=3^k, so, |Pz|=3
Similarly, the component of the vector lying in perpendicular to xz plane is Py=4^j, so, |Py|=4

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