If the vectors A =2 i +4 j and B =5 i - p j are parallel to each other, the magnitude of…
Physics · JEE Main · NTA Exams — Physics and Measurement
If the vectors \(\overrightarrow{\mathrm{A}}=2 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}\) and \(\overrightarrow{\mathrm{B}}=5 \hat{\mathrm{i}}-\mathrm{p} \hat{\mathrm{j}}\) are parallel to each other, the magnitude of \(\stackrel{\rightharpoonup}{\mathrm{B}}\) is
- \(5 \sqrt{5}\)
- 10
- 15
- \(2 \sqrt{5}\)
Answer
(A) 5 5
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