Force is applied to a body of mass 2 kg at rest on a frictionless horizontal surface as shown in the force against time $(\mathrm{F}-\mathrm{t})$ graph. The speed of the body after 1 s is

$2 \mathrm{~m} / \mathrm{s}$
$4 \mathrm{~m} / \mathrm{s}$
$6 \mathrm{~m} / \mathrm{s}$
$10 \mathrm{~m} / \mathrm{s}$
The order of (a) transformer (b) diode rectifier (c) filter (d) voltage regulator in a block diagram of simple rectifier circuit is as
(a) b, d, c, a
(b) a, c, d, b
(c) a, b, c, d
(d) d, c, a, b
d
a
c
b
A simple harmonic progressive wave is given by $y=A \sin 2 \pi\left(n t-\frac{x}{\lambda}\right)$. If the wave velocity is equal to $=\frac{1}{3}$ (maximum particle velocity) then the wavelength $\lambda$ is given by
$\frac{2 \pi \mathrm{~A}}{3}$
$\frac{\pi \mathrm{A}}{3}$
$\frac{5 \pi \mathrm{~A}}{3}$
$\frac{7 \pi \mathrm{~A}}{3}$
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