The Van de Graaff generator is not based on
- Athe phenomenon of Corona discharge.
- Bthe application of electric field and magnetic field which are perpendicular to each other.
- Cthe property that charge given to a hollow conductor is transferred to its outer surface and distributed uniformly over it.
- Dthe fact that if a charge is continuously supplied to an isolated metallic conductor,the potential of the conductor goes on increasing.
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Similar Questions
Three charges are placed as shown in the figure. The magnitude of $q_1$ is $2.00\, \mu C$,but its sign and the value of the charge $q_2$ are not known. Charge $q_3$ is $+4.00\, \mu C$,and the net force on $q_3$ is entirely in the negative $x-$ direction. As per the condition given,the signs of $q_1$ and $q_2$ will be
Difficult
View SolutionThe electric field $E$ is measured at a point $P(0, 0, d)$ generated due to various charge distributions and the dependence of $E$ on $d$ is found to be different for different charge distributions. List-$I$ contains different relations between $E$ and $d$. List-$II$ describes different electric charge distributions,along with their locations. Match the functions in List-$I$ with the related charge distributions in List-$II$.
List-$I$ List-$II$ $P$. $E$ is independent of $d$ $1$. $A$ point charge $Q$ at the origin $Q$. $E \propto \frac{1}{d}$ $2$. $A$ small dipole with point charges $Q$ at $(0, 0, l)$ and $-Q$ at $(0, 0, -l)$. Take $2l \ll d$. $R$. $E \propto \frac{1}{d^2}$ $3$. An infinite line charge coincident with the $x$-axis,with uniform linear charge density $\lambda$ $S$. $E \propto \frac{1}{d^3}$ $4$. Two infinite wires carrying uniform linear charge density parallel to the $x$-axis. The one along $(y=0, z=l)$ has a charge density $+\lambda$ and the one along $(y=0, z=-l)$ has a charge density $-\lambda$. Take $2l \ll d$ $5$. Infinite plane with uniform surface charge density
| List-$I$ | List-$II$ |
|---|---|
| $P$. $E$ is independent of $d$ | $1$. $A$ point charge $Q$ at the origin |
| $Q$. $E \propto \frac{1}{d}$ | $2$. $A$ small dipole with point charges $Q$ at $(0, 0, l)$ and $-Q$ at $(0, 0, -l)$. Take $2l \ll d$. |
| $R$. $E \propto \frac{1}{d^2}$ | $3$. An infinite line charge coincident with the $x$-axis,with uniform linear charge density $\lambda$ |
| $S$. $E \propto \frac{1}{d^3}$ | $4$. Two infinite wires carrying uniform linear charge density parallel to the $x$-axis. The one along $(y=0, z=l)$ has a charge density $+\lambda$ and the one along $(y=0, z=-l)$ has a charge density $-\lambda$. Take $2l \ll d$ |
| $5$. Infinite plane with uniform surface charge density |
Two point positive charges are placed at a distance $d$ apart. $A$ third positive charge is placed at a distance $x$ on the perpendicular bisector. For what value of $x$ is the force on the third charge maximum?
Difficult
View SolutionAn oil drop carries six electronic charges,has a mass of $1.6 \times 10^{-12} \text{ g}$ and falls with a terminal velocity in air. The magnitude of the vertical electric field required to make the drop move upward with the same speed as it was formerly moving is ........$kN/C$.
Medium
View Solution$A$ cube of side $b$ has a charge $q$ at each of its vertices. The electric field due to this charge distribution at the centre of this cube will be
Easy
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