Teaching UP TGT Mock Test Series 2025 Physics Vectors Unit Vectors

निम्नलिखित में से कौन सी एक इकाई सदिश है?

1
\(\hat i + \hat j\)
2
\(\hat i + \frac{\hat j}{\sqrt2}\)
3
\(\frac{\hat i}{\sqrt2} + \frac{\hat j}{\sqrt2}\)
4
उपरोक्त सभी
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