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NDA 2012
Exam
NDA
Year
2012
Subject
Mathematics
Chapter
Vector Algebra

NDA 2012 · Mathematics · Vector Algebra

Consider the following : 1. 4 i × 3 i = 0 2. 4 i 3 i =(4)/(3) Which...

Consider the following : 1. 4i^×3i^=0→2.4i^3i^=434 \hat{i} \times 3 \hat{i}=\overrightarrow{0} 2. \frac{4 \hat{i}}{3 \hat{i}}=\frac{4}{3} Which of the above is/are correct?

Options

  1. A1 only
  2. B2 only
  3. CBoth 1 and 2
  4. DNeither 1 nor 2

Correct answer

A. 1 only

Step-by-step solution

1. 4i^×3i^=02.4i^3i^=43∵4 \hat{i} \times 3 \hat{i}=0 2. \frac{4 \hat{i}}{3 \hat{i}}=\frac{4}{3}\because division of vector not applicable ∴\therefore only Ist\mathrm{I}^{\mathrm{st}} is correct.
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