Which of the following represent travelling wave? (1) y = A sin (15 t – 2x) (2) y = A cos (15 t) sin 2x (3) y = A sin (15 t) cos 2x (4) y = A e–x cos (15 t – 2x)

Weight at pole is 49 Newton then weight at equator? (1) 48.83 N (2) 49.17 N (3) 49.83 N (4) 49 N

Which of the following is correct for Zener diode (1) Lightly dopped, depletion layer thickness is less (2) Heavily dopped, depletion layer thickness is less (3) Lightly dopped, depletion layer thickness is more (4) Heavily dopped, depletion layer ...

The area of the region defined by $5x^2\leq y\leq 2x^2+9$ is (1) $6\sqrt3$ (2) $12\sqrt3$ (3) $18\sqrt3$ (4) $9\sqrt3$

Find the value of n+1C2 + 2(2C2 + 3C2 + …… + nC2) = ? (1) $n(n+1)(2n-1)\over6$ (2) $n(n+1)(2n+1)\over6$ (3) $(n-1)n(n+1)\over6$ (4) $n(n+1)\over2$

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