JEE MAIN - Physics (2022 - 25th June Morning Shift - No. 2)
$$\overrightarrow A $$ is a vector quantity such that $$|\overrightarrow A |$$ = non-zero constant. Which of the following expression is true for $$\overrightarrow A $$ ?
$$\overrightarrow A \,.\,\overrightarrow A = 0$$
$$\overrightarrow A \times \overrightarrow A < 0$$
$$\overrightarrow A \times \overrightarrow A = 0$$
$$\overrightarrow A \times \overrightarrow A > 0$$
Објашњење
$$\overrightarrow A \times \overrightarrow A = A \times A \times \sin 0^\circ $$
$$ = 0$$