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Recent questions tagged electrostatics
Questions
A proton is released from rest , 10 cm from a charged sheet carrying charge density of $\;-2.21\times10^{-9}\;c/m^2\;.$ It will strike the sheet after time $\;(approximately)$
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
medium
asked
Jan 30, 2014
by
yamini.v
1
answer
Two point charges $\;q_{1}=3\times10^{-6}\;C\;$ and $\;q_{2}=5\times10^{-6}\;C\;$ are located at $\;(3 , 5 ,1)\;$ and $\;(1 , 3 , 2)\;m$ . Find the force on $\;q_{1}\;$ due to $\;q_{2}\;.$
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
Find the force on points of a triangle
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
Consider the situation of figure the work done in moving to particles from P to A is $\;W_{A}\;is\;W_{B}\;$ and $\;P\;to\;C\;W_{C}\;$ Find the correct relation .
jeemain
physics
class12
unit11
electrostatics
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
A ring of radius R is having charges $\; q \;and \; 3 q\;$ distributed on its two half parts . The electric potential at a point on the axis $\;\sqrt{3}\;R\;$ from its centre is
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
A proton , a deutron and alpha particle are accelerated through potentials of $\;V , 2V ,4V\;$respectively . Their velocity will bear a ratio .
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential-energy
medium
asked
Jan 29, 2014
by
yamini.v
1
answer
The electric field in a region is given by $\;\overrightarrow{E}=5 \hat{i} - 3 \hat {j}\;.$ Find $\;V_{B}-V_{A}\;.$ If A is origin & B is $\;(0,0,5)\;m$
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
An electric field $\;\overrightarrow{E}=(2 \hat{i}+3\hat{j})\;N/C$ exists in space . if the potential at the origin is zero , find the potential at $\;(2 ,2 )\;m$
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
Two charge particles are placed at 1 m apart what is the minimum possible magnitude of electric force acting on each charge
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
Equal charges q are placed at x=0,2,4,8 m on x axis . Find the $\;|force|\;$ experienced by the charge at x=2 m
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
Two point charges $\;q_{1}\;and\;q_{2}\;$ are placed on $\;x=-a\;and\;x=+a\;respectively\;.$ Find the relation between $\;q_{1}\;and\;q_{2}\;$ so that the net electric field at $\;x=+\large\frac{a}{2}\;$ is zero
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field-due-to-multiple-charges
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
Find the direction of electric field at point P for the charge distribution as shown in figure
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
If a body is charged by rubbing it , its weight
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-charge
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
A point charge q=12.5 $\mu $C is placed at origin . Find the electric field vector at the point $\;(4 , 3)$ .
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field-due-to-multiple-charges
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
Three point charges of each of charge q are placed on three vertices of a square of side "l" meter . Find the magnitude of electric field at the centre of the square .
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field-due-to-multiple-charges
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
Identify the correct statement about the charges $\;q_{1} \;and\; q_{2}$
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-charge
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
At what separation should two equal charges 1.0 C be placed so that the force between then equals the weight of a 25 kg person ?
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
Units of electric flux are
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-flux-and-dipole
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
When the separation between two charges is increased the electric potential energy of the charges
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
What is the total charge on 75.0 kg of electrons ?
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-charge
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
How many electrons must be removed from a piece of metal to give it a positive charge of $\;1\times10^{-7} \;C\;?$
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-charge
easy
asked
Jan 29, 2014
by
yamini.v
1
answer
Given electric field $ \overrightarrow {E} =[1 \times (d + x) \hat i +E_0 \hat j ] N/c$. If a closed surface as shown below is considered , find the change enclosed.
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
gausss-law
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
Two point particles of same mass M are attached to two ends of a massless non-conducting rigid rod of length l. The charge on particle are +q and -q. The rod is held in a region of uniform electric field E making an angle $\theta $( very small) with E. The time t , after itself parallel to electric field after releasing it is :
jeemain
physics
class12
unit11
electrostatics
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
Two point particles of same mass M are attached to two ends of a massless non-conducting rigid rod of length l. The charge on particle are +q and -q. The rod is held in a region of uniform electric field E making an angle $\theta $( very small) with E. When rod is released , its angular frequency will be :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-flux-and-dipole
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
Two point particles of same mass M are attached to two ends of a massless non-conducting rigid rod of length l. The charge on particle are +q and -q. The rod is held in a region of uniform electric field E making an angle $\theta $( very small) with E. Magnitude of torgue on rod will be equal to:
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-flux-and-dipole
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
Three infinite long plane sheets carrying charge densities $\sigma _1 =+3 \sigma , \sigma _2 =+2 \sigma $ and $\sigma _3 =- \sigma $ are placed parallel to $x-z$ plane at $y=4a,y=3a$ and $y=a $ respectively. Electric field at point P is :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
A charge $-q$ is fixed at each of the points $x= 2 m,x=4m,x=6m.... $ up to infinity and charge $+q$ is fixed at each of the points $x=1 m ,x= 3m , x=5m....$ up to infinity. The potential at the origin will be :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
If electron of mass $m_e$ moves through a certain distance in a uniform electric field in time $t_1$ and proton of mass $m_p$ moves same distance in time $t_2$ , the ratio $\large\frac{t_1}{t_2}$ will be :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
A capacitor of capacitance $C_0$ is charge to potential $V_0$ and then isolated . A small capacitor C is charged from $C_0$, discharge and then charged again; this process is repeated n times. Due to this potential of $C_0$ decreases to r. Value of C is :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
parallel-plate-capacitor
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
If electric field $\overrightarrow{E} = 2\hat i +3 \hat j $ , Potential difference between two point $V_A- V_B$, where $r_A=\hat i+ 2 \hat j $ and $r_B=2 \hat i +\hat j + 3 \hat k $ will be
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
difficult
asked
Jan 15, 2014
by
meena.p
1
answer
Two thin rings of radius R are placed at a distance a between them such that their axes coincide. Potential difference between the centre of the ring will be , if charges on rings are $+q $ and $-q$
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
A spherical shell of radius R has a charge Q uniformly distributed on its surface. What is the force exerted by one half over the other.
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
Find electric field at point $(a,a,a) $ due to three infinitely long lines of charge density $\lambda$ along $x,y $ and $ z$ axis
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
Three identical spheres , each having a charge q and radius R are kept in such a way that each touches the other two. Find magnitude of electric force on any sphere due to other two sphere,
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
force-between-multiple-charges
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
What will be the electric field at point P. Assume (r >> a)
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
force-between-multiple-charges
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
The capacitor plates are fixed on inclined plane p connected to a battery of emf E. A dielectric slab of mass m and dielectric constant k is inserted into the capacitor and tied to mass M using a weightless string as shown. If capacitance have plate area A, length l and distance d between them. Find M such that slab stays in equilibrium. Assume zero friction between slab and plates
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
effect-of-dielectric-on-capacitance
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
A ring of radius R carries charge $+q$ uniformly distributed on it. If a charge $- 90$ is released on ring's axis at a distance $\sqrt 3 R$ from its centre , the kinetic energy of $-90$ when it reaches the centre of ring will be :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
Six plates of same area A are arranged as shown. Equivalent capacitance of arrangement between A and B is :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
combination-of-capacitors
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
A uniform electric field of $200 \;Vm^{-1} $ is directed $60^{\circ}$ to $+ve$ X-axis . If $OA=2 m, V_0-V_A$ is
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
Three concentric spherical conductors are shown, Find equivalent capacitance b/w A and B
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
combination-of-capacitors
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
A parallel plate capacitor is immersed in liquid of dielectric constant K. Find force per unit area acting on plate from the liquid from dielectric in contact with the plate.
jeemain
physics
class12
unit11
electrostatics
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
A cylindrical layer of homogeneous dielectric with dielectric constant K is introduced in a cylindrical capacitor so that a gap of width d is filled in between them. Radius of plate $R > > d$. If the capacitor is connected to battery of EMF V, the force pulling the dielectric inside the capacitor is :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
effect-of-dielectric-on-capacitance
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
A point charge Q is placed at the centre of an imaginary Gaussian surface. Find flux through curved surface.
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
gausss-law
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
Electric field intensity due to a semi- infinite wire at a point A as shown is :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
difficult
asked
Jan 13, 2014
by
meena.p
1
answer
In the circuit given below, the position of switch S is shifted from 1 to 2 . choose the correct statement
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
combination-of-capacitors
difficult
asked
Jan 10, 2014
by
meena.p
1
answer
A thin metal sheet is placed between the plates of a parallel plate capacitor. Its capacitance will
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
parallel-plate-capacitor
medium
asked
Jan 10, 2014
by
meena.p
1
answer
Potential difference between points A and B is 5V, then voltage across $2 \mu F$ capacitor is :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
combination-of-capacitors
difficult
asked
Jan 10, 2014
by
meena.p
1
answer
Three identical metal plates are kept parallel to one another at seperation $d_1\; and\; d_2 $ If both the outer plates are connected to ground and middle plate is given charge q, The charge on right side of middle plate will be :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
parallel-plate-capacitors
medium
asked
Jan 10, 2014
by
meena.p
1
answer
A charged particle moves in a circle around an infinite line charge such that center of circle lies on line and line is perpendicular to plane of circle. If r is the radius of circle the velocity of particle will depend on which power of r .
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
continuous-charge-distribution
medium
asked
Jan 10, 2014
by
meena.p
1
answer
A conducting spherical shell is earthed. A +ve charge $+q_1$ is placed at its centre and another +ve charge $+q_2$ is placed outside at a distance d from centre . If the conducting spherical shell is not earthed , then force on $q_2$ is:
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
medium
asked
Jan 10, 2014
by
meena.p
1
answer
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