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Q. No.Given \(\overrightarrow {a}+ \overrightarrow {b}+\overrightarrow {c}+\overrightarrow {d}=0\), which one of the following is incorrect?
| 1. | \(\overrightarrow {a}\), \(\overrightarrow {b}\), \(\overrightarrow {c}\) and \(\overrightarrow {d}\) must be null vectors. |
| 2. | The magnitude of \(\overrightarrow {a}+\overrightarrow {c}\) equals the magnitude of \(\overrightarrow {b}+\overrightarrow {d}\). |
| 3. | The magnitude of \(\overrightarrow {a}\) can never be greater than the sum of the magnitudes of \(\overrightarrow {b}, \overrightarrow {c}\) and \(\overrightarrow {d}\). |
| 4. | \(\overrightarrow {b}+\overrightarrow {c}\) must lie in the plane of \(\overrightarrow {a}\) and \(\overrightarrow {d}\) if \(\overrightarrow {a}\) and \(\overrightarrow {d}\) are not collinear, and along the direction of \(\overrightarrow {a}\) and \(\overrightarrow {d}\) if they are collinear. |
Subtopic: Â Resultant of Vectors |
 53%
Level 3: 35%-60%
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A scalar quantity is one that:
| 1. | is conserved in a process. |
| 2. | will never accept negative values. |
| 3. | must be dimensionless. |
| 4. | has the same value for observers with different orientations of axes. |
Subtopic: Â Scalars & Vectors |
 61%
Level 2: 60%+
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