A mass m carrying a charge `q` is suspended from a string and placed in a uniform horizontal electric field of intensity `E`.The angel made by the string with the vertical in the equilibrium position is

A mass m carrying a charge q si suspended form a string and placed in a uniform horizontal electric field of intensity E .The angel made by the string with the vertical in the equilibrium position is

A simple pendulum with a bob of mass m is suspended from the roof of a car moving with a horizontal accelertion a. The angle made by the string with verical is

A particle of mass m is suspended by a string of length l from a fixed rigid support. Particle is imparted a horizontal velocity u=sqrt(2gl) . Find the angle made by the string with the vertical when the acceleration of the particle is inclined to the string by 45^(@) ?

A uniform electric field of 3xx10^4 N/C is applied iin a horizontal direction . A pendulum bob of mass 90 mg and carrying a charge of 1.5xx10^(-8) C is suspended through a string of length 1m. Calculate tension developed in the string and the angle made by the string with the vertical .

An oil drop of mass m and charge +q is balanced in vaccum by a uniform electric field of intensity E . the direction of this field should be

A "0.50gm" ball carries a charge of magnitude 10 mu C" It is suspended by a string in a downward electric field of intensity "300N/C" .If the charge on the ball is positive,then the tension in the string is g=10ms^(-2)

The simple pendulum of the previous problem is placed in uniform electric field E , directed horizontally. Find the angle made by string with vertical in equilibrium and tension in the string . Now the ball is slightly displaced and it exceutes simple harmonic motion, find its time period of oscillation.