A simple pendulum with a negatively charged bob is made to oscillate just above a positively charged plate. What happens to its time period?

The time period of a simple pendulum inside a stationary lift is T. If the lift starts. moving upwards with an acceleration of g/3 what will be its time period ?

What is the average size of colloidal particles? Name two negatively charged and two positively charged colloids.

Define mobility of a charge carrier. What is its relation with relaxation time?

A simple pendulum is suspended from the roof of a lift. What will be its time period when the lift moves downwards with an acceleration a

The bob of a simple pendulum of length 1 m is' pulled aside from its equilibrium’ position through an angle 60^@ and released. Calculate the speed at which the bob passes the equilibrium position.

A particle starts oscillating simple harmonically from its equilibrium portion. What is the ratio of KE and PE. of the particle at time T/12 second ? (T is the time period of oscillation)

A simple pendulum of length I and mass m is suspended in a car that is travelling with a constant speed v around a circle of radius R. If the pendulum undergoes small oscillations about its equilibrium position, what will be its frequency•of oscillation ?

A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation. The speed of the bob at its mean position is 1 m s^1. What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme positions, (b) at its mean position.