For what value of a, A =2 i +a j + k will be perpendicular to B =4 i -2 j - k
Physics · JEE Main · NTA Exams — Physics and Measurement
For what value of a, \(\overrightarrow{\mathrm{A}}=2 \hat{\mathrm{i}}+a \hat{\mathrm{j}}+\hat{\mathrm{k}}\)will be perpendicular to \(\overrightarrow{\mathrm{B}}=4 \hat{\mathrm{i}}-2 \hat{\mathrm{j}}-\hat{\mathrm{k}}\)
- 4
- zero
- 3.5
- 1
Answer
(C) 3.5
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