Recent questions tagged coulomb-law

Two point charges $\;q_{1}$ and $\;q_{2}$ are placed at a certain distance d from each other . The interacting force between them is F . Now both charges kept in oil of relative permittivity 5 . What is the new value of force between them

asked Feb 6, 2014 by yamini.v

1 answer

A charge Q is to be divided on two objects . What should be the values of the charges on the objects so that the force between the objects can be maximum

asked Feb 5, 2014 by yamini.v

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A particle having a charge of $\;2 \mu C\;$ is placed directly below and at a separation of 10 cm from the bob of a simple pendulum at rest . What charge should the bob be given so that the string becomes loose ? mass of the bob is 1 kg .

asked Feb 5, 2014 by yamini.v

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Two charged particles having charge $\;2.0\times10^{-8}\;C\;$ each are joined by an insulating string of length 1m and the system is kept on smooth horizontal table . Find the tension in the string

asked Feb 5, 2014 by yamini.v

1 answer

Two identical balls having a mass m and small radii and having equal charge q are suspendended from common point by two insulating strings of equal length l . In equilibrium each string makes an angle $\;\theta\;$ with the vertical . If $\;\theta=45^{0}\;find\;l^2$ in terms of q and m

asked Feb 4, 2014 by yamini.v

1 answer

An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r . Find the coulomb force $\;\overrightarrow{F}\;$ between the two

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 $\;q_{2}\;.$

asked Jan 30, 2014 by yamini.v

1 answer

Find the force on points of a triangle

asked Jan 30, 2014 by yamini.v

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Two charge particles are placed at 1 m apart what is the minimum possible magnitude of electric force acting on each charge

asked Jan 29, 2014 by yamini.v

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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

asked Jan 29, 2014 by yamini.v

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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 ?

asked Jan 29, 2014 by yamini.v

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:

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 effect of induced charge due to $q_2$ on sphere is ignored. Then coulomb force on $q_2$

asked Jan 10, 2014 by meena.p

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A change A is divided into two parts: q and Q-q. if Coulomb repulsion between them when they are separated is maximum , $\large\frac{Q}{Q-q}$ should be :

asked Jan 3, 2014 by meena.p

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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 :

asked Jan 3, 2014 by meena.p

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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 :

asked Jan 3, 2014 by meena.p

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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

asked Jan 3, 2014 by meena.p

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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.

asked Jan 3, 2014 by meena.p

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