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Question

Two vectors are a\=5i^+2j^ and b\=−3i^+4j^. What is the magnitude of a×b?

Options

Choose one · Correct answer highlighted

Explanation

a×b = |i^j^k^520−340| = k^(5×4−2×(−3)) = k^(20+6) = 26k^. Magnitude = 26. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 26. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.