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Recent questions tagged electrostatics
Questions
The electric potential as a function of distance x is given by $ V= (-5x ^2-10 x +9) \;volt$ . The electric field at point $(1,2)$ is
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
easy
asked
Jan 3, 2014
by
meena.p
1
answer
A charge q is placed at middle point of the line joining two equal charges +Q. The value of q such that system is in equilibrium is :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 3, 2014
by
meena.p
1
answer
A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 25 V. The electric field at centre of sphere is :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
easy
asked
Jan 3, 2014
by
meena.p
1
answer
Two small spherical balls whose charges are $20 \mu c$ each are hanged with help of 1 m long thread from roof. In equilibrium both threads are seperated by $ 60^{\circ}$ Tension in each thread is :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 3, 2014
by
meena.p
1
answer
A $0.4 \mu F$ capacitor is charged to $1200 v. $ After removing battery a $0.2 \mu F$ capacitor is connected in parallel to it. The voltage on capacitor will become :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
combination-of-capacitors
easy
asked
Jan 3, 2014
by
meena.p
1
answer
Electric potential at any point is $V=-10 x +6y +\sqrt {60 }z$, then magnitude of electric field is :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
easy
asked
Jan 3, 2014
by
meena.p
1
answer
If capacitor is changed from 0 to 20 v using constant current. Variation in energy U of capacitor with time t will be
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
parallel-plate-capacitors
easy
asked
Jan 3, 2014
by
meena.p
1
answer
All the capacitors shown in circuit are identical . Each can withstand maximum $100 V$ between its terminals . The maximum voltage that can be applied safely b/w A and B is
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
combination-of-capacitors
easy
asked
Jan 3, 2014
by
meena.p
1
answer
Two metal balls of same radii are charged to 5 and -25 units of electricity . They are brought in contact with each other and then again seperated to original distance. Ratio of magnitude of force b/w two balls after and before contact is
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 3, 2014
by
meena.p
1
answer
In a medium of dielectric constant K, the electric field is $\overrightarrow {E}$, if $\in _0$ is permittivity of free space , the electric displacement vector is :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
easy
asked
Jan 3, 2014
by
meena.p
1
answer
Potential of any point inside a charged hollow sphere :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrosatics-of-conductors
easy
asked
Jan 3, 2014
by
meena.p
1
answer
A force F acts between two charges kept 1 cm apart in air. If permittivity of air and dielectric constant of water are $\in _0$ and $K$ respectively, find the force acting when both atoms are placed in water.
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
coulomb-law
easy
asked
Jan 3, 2014
by
meena.p
1
answer
Total electric flux coming out of unit positive charge put in air is :
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
gausss-law
easy
asked
Jan 3, 2014
by
meena.p
1
answer
n identical condensers are joined in series and are charged to potential v. Now they are seperated and joined in parallel. Total energy and potential difference of combination will be :
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
combination-of-capacitors
easy
asked
Jan 3, 2014
by
meena.p
1
answer
Angle between lines of force and equi-potential surface is?
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
equipotential-surfaces
easy
asked
Dec 20, 2013
by
balaji.thirumalai
1
answer
If the space between two plates of a capacitor is filled with liquid of dielectric constant K, the capacitance of the capacitor:
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
effect-of-dielectric-on-capacitance
easy
asked
Dec 20, 2013
by
balaji.thirumalai
1
answer
Two plates are 5 cm apart, a potential difference of 10V is applied between them. What is the electric field between the plates?
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
easy
asked
Dec 20, 2013
by
balaji.thirumalai
1
answer
A condenser of $100\; \mu F$ is charged to $50 V$. What is its energy in Joules?
jeemain
physics
class12
ch2
electrostatics
electrstatic-potential-and-capacitance
parallel-plate-capacitor
easy
asked
Dec 20, 2013
by
balaji.thirumalai
1
answer
Radii of two spheres forming a spherical condenser are 0.3 and 0.4m. If dielectric constant of medium is 4 and medium is completely filled in between, find the capacity of the condenser..
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
effect-of-dielectric-on-capacitors
easy
asked
Dec 20, 2013
by
balaji.thirumalai
1
answer
If three equal charges are placed on three corners of square and force between $q_1$ and $q_2$ is $F_2$, and the force between $q_1$ and $q_2$ is $F_3$, find $F_3/F_2$
jeemain
physics
class12
ch1
electrostatics
coulombs-law
electric-charges-and-fields
force-between-multiple-charges
easy
asked
Dec 20, 2013
by
balaji.thirumalai
1
answer
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