The average velocity of a particle performing S.H.M. in one complete vibration is ( $\mathrm{A}=$ amplitude of S.H.M., $\omega=$ angular velocity)
zero
$\mathrm{A} \omega$
$\frac{\mathrm{A} \omega}{2}$
$\frac{\mathrm{A} \omega^2}{2}$
The range of voltmeter of resistance $300 \Omega$ is 5 V . The resistance required to be connected to convert it into an ammeter of range 5 A is nearly
$1 \Omega$ in series
$1 \Omega$ in parallel
$0.1 \Omega$ in series
$0.1 \Omega$ in parallel
The value of acceleration due to gravity (g) becomes $\left(\frac{g}{3}\right)$ at height ' $h$ ' above the earth's surface. If ' R ' is the radius of earth, the height h will be equal to
$\sqrt{3} \mathrm{R}$
3 R
$(\sqrt{3}-1) \mathrm{R}$
$(\sqrt{3}+1) R$
A bicycle wheel of diameter ' $D$ ' has ' $N$ ' number of spokes. Wheel is rotating at the rate of ' $x$ ' revolutions per minute, perpendicular to the horizontal component of earth's magnetic field ' $\mathrm{B}_{\mathrm{H}}$ '. The e.m.f. induced between the rim and the centre of the wheel will be
$\frac{\mathrm{B}_{\mathrm{H}} \pi \mathrm{Dx}}{120}$
$\quad \frac{\mathrm{B}_{\mathrm{H}} \pi \mathrm{Dx}}{240}$
$\frac{B_H \pi D^2 x}{240}$
$\quad \frac{\mathrm{B}_{\mathrm{H}} \pi \mathrm{D}^2 \mathrm{x}}{120}$
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