A ring of dielectric material, with a total charge +q distributed uniformly over its surface, rotates with angular speed `omega.` Find the magnetic moment of the ring .Compare its magnetic moment with its angular momentum , assuming that its mass is m.
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A point charge `q_(0)` is placed at the centre of uniformly charges ring of total charge Q and radius R. If the point charge is slightly displaced wit
Only electric force is acting on `q_(0)` `:. W_(el)=DeltaK" "=1/2 mv^(2)-0" "implies" "`Now `W_(el)")"_(c rarr oo) =q_(0) V_(c) =q_(0) (KQ)/R`. `:. (Kq_(0)Q)/R=1/2 mv^(2)" "implies" "v=sqrt((2Kq_(0)Q)/(mR))`
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A dielectric spheri- cal shell of radius R, having charge `Q` is rotating with angular speed w about its diameter. Calculate the magnetic dipole momen
Correct Answer - `M=(QomegaR^(2))/3;M/L=Q/(2m)`
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If `y_(1)=max||z-omega|-|z-omega^(2)||`, where `|z|=2` and `y_(2)=max||z-omega|-|z-omega^(2)||`, where `|z|=(1)/(2)` and `omega` and `omega^(2)` are c
Correct Answer - C `(c )` We have `||z_(1)|-|z_(2)|| le |z_(1)-z_(2)|` and equality holds only when `argz_(1)=argz_(2)` `implies||z-w|-|z-w^(2)|| le |w^(2)-w| le sqrt(3)` and equality canhold only when `|z|=2` and not when...
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A this disc of dielectric material, with a total charge +q distributed uniformly over its surface, rotates with angular speed `omega` about an axis pe
Correct Answer - `(1)/(4)qwr^(2),(q)/(2m)`
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A thin disc of dielectric material, with a total charge +q distributed uniformly over its surface rotates n times per second about an axis perpendicua
Correct Answer - `(mu_(0)nq)/(r )`
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A charge +Q is uniformly distributed over a thin ring of a radius R. Find the velocity of a negative point charge -Q at the moment it passes through t
Correct Answer - `v=sqrt(1/(4piepsi_0)(2Q^2)/(Rm)`
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A ring of radius R carries a charge q uniformly distribited over it. A long thin wire carrying charge `lambda`per unit length of it is held along its
Correct Answer - `F=(dlambda)/(4piepsilon_(0)R)`
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A spherical shell of radius `R_(1)` with uniformly distributed charge q has a point charge `q_(0)` at its centre. Find the work performed by the elect
Correct Answer - `(q(q_(0)+q//2))/(4piepsilon_(0))((1)/(R_(1))-(1)/(R_(2)))`
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A long cylinder of radius `a` carrying a uniform surface charge rotates about its axis with an angular velocity `omega`. Find the magnetic field energ
Correct Answer - `(mu_(0)lamda^(2)omega^(2)a^(2))/(8pi)`
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A uniformly charged sphere carries a total charge of `2 pi xx10^(-12)` C. Its radius is 5 cm and is placed in vacuum. Determine its surface charge den
Correct Answer - `2xx 10^(-10)Cm ^(2)`
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